O

 

O&I                                                                        operations and intelligence (FM 3‑21.20, FM 3‑90.6)

O&M                                                                      operation and maintenance; organization and methods

O&MFH                                                                operation and maintenance, family housing

O/C                                                                        observer/controller (ARTEP 7‑94‑MTP)

O/G                                                                        observer grid (FM 3‑22.1)

O/O                                           on order (FM 1‑02)

O/P                                                                        ownership/purpose code

OA                                            objective area (FM 1‑02); on or about

OAD                                                                       operational availability data; ordered to active duty

OAKOC                                       observation and fields of fire, avenues of approach, key terrain, obstacles, and cover and concealment

OARB                                                                    Oakland Army Base

OAS                                                                       Organization of American States; offensive air support (FM 1‑02)

OAT                                                                       operational acceptance test

ob                                                                           obsolete (use abbreviations only in graphics)

OB or OOB                                  order of battle (FM 1‑02)

obj                                                                         objective (FM 1‑02); object; obstacle (ARTEP 7‑91‑Drill (ARTEP 7‑91‑MTP (use abbreviations only in graphics)

object                                                                  (computers) All visual screen elements such as buttons, text, graphics, All objects have properties and may have program code. In object‑oriented programming, the objects range from human beings (described by name, address, and so on.) to buildings and floors (whose properties can be described and managed) down to the visual element on your computer desktop (such as buttons and scroll bars), (TRADOC Pam 350‑70‑2)

objective                                    (DOD) 1. The clearly defined, decisive, and attainable goals towards which every military operation should be directed. 2. The specific target of the action taken (for example, a definite terrain feature, the seizure or holding of which is essential to the commander's plan, or, an enemy force or capability without regard to terrain features; NATO) The physical object of the action taken, for example, a definite tactical feature, the seizure and/or holding of which is essential to the commander's plan (Army) 1. One of the nine principles of war: Direct every military action toward a clearly defined, decisive, and attainable objective (FM 3‑0) 2. A location on the ground used to orient operations, phase operations, facilitate changes of direction, and provide for unity of effort (FM 3‑90) See also decisive point; principles of war; target. (See Table 7‑10 for symbol)

objective force                                               (obsolete; use 'future force' instead)

object‑oriented pro­gramming                A program consisting of modular chunks interact with each other and can be reused with little modification if any in other programs)

OBLAUTH                                                            obligation authority

oblg                                                                       obligate (use abbreviations only in graphics)

obs                                                                        obstacle (ARTEP 7‑91‑Drill (use abbreviations only in graphics)

obs num                                     observer number (FM 3‑22.91)

obscurant                                   A chemical agent that decreases the energy available for the functions of seekers, trackers, and vision enhancement devices (FM 3‑50)

obscuration                                 The effects of weather, battlefield dust, and debris, or the use of smoke munitions to hamper observation and target‑acquisition capability or to conceal activities or movement (FM 3‑50)

obscuration smoke                       Smoke placed on or near enemy positions to minimize enemy observation both within and beyond the position area (FM 3‑50)

observation post                          (DOD, NATO) A position from which military observations are made, or fire directed and adjusted, and which possesses appropriate communications; may be airborne. Also called OP, FM 3‑90. (See Table 7‑9 for symbol)

observed fire                               (DOD, NATO) Fire for which the point of impact or burst can be seen by an observer. The fire can be controlled and adjusted on the basis of observation, also fire, FM 6‑30)

observer‑target line                      (DOD, NATO) An imaginary straight line from the observer/spotter to the target, FM 6‑30)

obsn                                                                      observation (use abbreviations only in graphics)

obstacle                                     (DOD) Any obstruction designed or employed to disrupt, fix, turn, or block the movement of an opposing force, and to impose additional losses in personnel, time, and equipment on the opposing force. Obstacles can be natural, manmade, or a combination of both, also reinforcing obstacles, FM 90‑7. (See Table 7‑14 for symbol)

obstacle belt                               (DOD) A brigade‑level command and control measure, normally given graphically, to show where within an obstacle zone the ground tactical commander plans to limit friendly obstacle employment and focus the defense. It assigns an intent to the obstacle plan and provides the necessary guidance on the overall effect of obstacles within a belt, also obstacle, FM 3‑90. (See Table 7‑14 for symbol)

obstacle control measures             Specific measures that simplify the granting of obstacle‑emplacing authority while providing obstacle control (FM 3‑90)

obstacle groups                           One or more individual obstacles grouped to provide a specific obstacle effect (FM 3‑90)

obstacle line                               A conceptual control measure used at battalion or brigade level to show placement intent without specifying a particular type of linear obstacle (FM 90‑7; see Table 7‑14 for symbol)

obstacle restricted areas               (DOD) A command and control measure used to limit the type or number of obstacles within an area, also obstacle, FM 90‑7. (See Table 7‑14 for symbol)

obstacle zone                              (DOD) A division‑level command and control measure, normally done graphically, to designate specific land areas where lower echelons are allowed to employ tactical obstacles, also countermobility operations; obstacle, FM 3‑90. (See Table 7‑14 for symbol)

OBSTINTEL                                                       obstacle intelligence (FM 3‑90.1)

OBT                                                                       observer training

obturator                                                           (noun) something that closes or blocks an opening, Merriam‑Webster online 2002)

OC                                                                          officer candidate; operations central; observer‑controller (ARTEP 7‑20‑MTP)

OCA                                                                       Office of the Comptroller of the Army; operational control authority; offensive counterair (FM 1‑02)

OCAR                                                                    Office of the Chief, Army Reserve

OCAS                                                                    Office, Coordinator of Army Studies

OCB                                                                       Operations Coordinating Board

OCC                                                                       operational control console

OCCH                                                                    Office of the Chief of Chaplains

OCCIS                                                                  Operational Command and Control Intelligence System

OCCMED                                                             occupational medicine

OCCS                                                                    operational command and control system

occupied**                                 Ground equipment present at tasked target location. Opposite of VACANT)

occupy                                      A tactical mission task that involves a force moving into an area so that it can control the entire area. Both the force's movement to and occupation of the area occur without enemy opposition (FM 3‑90; see Table A‑1 for symbol)

OCE                                                                       Office of the Chief of Engineers; officer conducting the exercise

OCHAMPUS                                                       Office for the Civilian Health and Medical Program of the Uniformed Services

OCL                                                                       operator's checklist (FM 3‑22.34)

OCLL                                                                     Office of the Chief of Legislative Liaison

OCM                                                                      on‑condition maintenance

OCMH                                                                   Office of the Chief of Military History

OCO                                                                      operational capability objective

OCOKA                                                                 (Obsolete; replaced by OAKOC)
observation and fields of fire, cover and concealment, obstacles, key terrain, and avenues of approach

OCONUS                                                             outside continental United States (FM 7‑0, (TRADOC Pam 350‑70‑2)

OCP                                                                       Office of Civilian Personnel; operational capability plan

OCPA                                                                    Office of the Chief of Public Affairs

OCR                                                                       optical character recognition, (TRADOC Pam 350‑70‑2); optical character reader

OCRE                                                                    optical character recognition equipment

OCS                                                                       Officer Candidate School; offensive counterspace (FM 1‑02)

OCSA                                                                    Office of the Chief of Staff, U.S. Army

Oct                                                                        October (use abbreviations only in graphics)

OCT                                                                       Officer Candidate Test

OD                                                                          officer of the day; Ordnance Corps; olive drab (FM 3‑23.30, FM 3‑21.220)

ODCSOPS                                   Office of the Deputy Chief of Staff for Operations and Plans (FM 1‑02)

ODCSPER                                                            Office of the Deputy Chief of Staff for Personnel

ODCSRDA                                                           Office of the Deputy Chief of Staff for Research, Development, and Acquisition

ODDRE                                                                 Office of Director of Defense Research and Engineering

ODP                                                                       officer development program (ARTEP 71‑2‑MTP)

ODRI                                                                     Office of United States Defense Representative, India

ODRP                                                                    Office of Defense Representative, Pakistan

ODS                                                                       Operation Desert Storm (FM 3‑22.1, STP 7‑11M14‑SM‑TG)

ODSCLOG                                                           Office of the Deputy Chief of Staff for Logistics

ODSS                                         offense, defense, stability, and support (FM 1‑02)

ODT                                                                       overseas deployment for training (FM 7‑0)

ODTS                                                                    optical discrimination and tracking system

ODWSA                                                               Office of the Directorate of Weapon Systems Analysis

OE                                                                          organizational effectiveness; operational environment

OEA                                                                       organizational expense accounts

OEC                                                                       operational employment concept

OEF                                                                       Operation "Enduring Freedom"

OEG                                           operation exposure guide (not guidance, FM 1‑02); organization and equipment guide

OEL                                                                        organizational equipment list

OEM                                                                      on equipment materiel

OEP                                                                       Office of Emergency Planning; operational employment plan

OER                                                                       officer evaluation report

OERS                                                                    officer evaluation reporting system

OES                                           open enterprise server; Office of Emergency Services; Officer Education System

OET                                                                       Office of Emergency Transportation

OF                                                                          optional form (DA Pam 25-40)

ofc                                                                         office (use abbreviations only in graphics)

OFEC                                                                    Office of Federal Employees' Compensation

OFF (direction)                            Informative call indicating attack is terminated and maneuvering to the indicated direction)

offensive                                    One of the nine principles of war: Seize, retain, and exploit the initiative, also principles of war (FM 3‑0)

offensive air support                     (Army) That part of tactical air support of land operations that consists of tactical air reconnaissance and close air support, which are conducted in direct support of land operations (FM 3‑04.111; Marine Corps) Those air operations conducted against enemy installations, facilities, and personnel to directly assist the attainment of MAGTF objectives by the destruction of enemy resources or the isolation of the enemy's military forces. Also called OAS (FM 1‑02)

offensive counterair                      (DOD) Offensive operations to destroy, disrupt, or neutralize enemy aircraft, missiles, launch platforms, and their supporting structures and systems both before and after launch, but as close to their source as possible. Offensive counterair operations range throughout the enemy territory and are generally conducted at the initiative of friendly forces. These operations include attack operations, fighter sweep, escort, and suppression of enemy air defenses. Also called OCA, also counterair; defensive counterair; operation, FM 44‑100)

offensive counterspace                 Combat operations conducted against enemy systems (or their support systems) designed to operate in space (for example, a directed‑energy weapon operating from an aircraft or ground location that is used to destroy enemy satellites) Also called OCS (FM 44‑100)

offensive information operations      (DOD) The integrated use of assigned and supporting capabilities and activities, mutually supported by intelligence, to affect adversary decisionmakers to achieve or promote specific objectives. These capabilities and activities include, but are not limited to, operations security, military deception, psychological operations, electronic warfare, physical destruction, and special information operations, and could also include computer network attack (Army) The integrated use of assigned and supporting capabilities and activities, mutually supported by intelligence, to affect enemy decisionmakers or to influence others to achieve or promote specific objectives, also computer network attack; defensive information operations; electronic warfare; information operations; intelligence; military deception; operations security; psychological operations (FM 3‑0)

offensive operations                     Operations which aim at destroying or defeating an enemy. Their purpose is to impose US will on the enemy and achieve decisive victory (FM 3‑0)

off‑load                                                               (trans verb, Third New International Dictionary, Unabridged)

offloaded                                                            (adj)

offset (direction)                         Directive/informative call indicating maneuver in a specified direction with reference to the target)

OFGR                                                                    objective force gross requirement

OFT                                                                       observed fire trainer

OG                                                                          officer of the guard

OGA                                          other governmental agency (FM 3‑21.20)

OH                                                                          observation helicopter (FM 3‑21.20, FM 3‑90.6, ARTEP 7‑20‑MTP, ARTEP 71‑2‑MTP)

OHMP                                                                   (US Army) Oral Health Maintenance Program

OI                                                                           operating instructions; operations and intelligence (FM 3‑21.20)

OIC                                                                        officer in charge (of)

OICC                                                                     officer in charge of construction

OICW                                                                    objective individual combat weapon

OIDP                                                                     Overseas Internal Defense Policy

OIF                                                                        Operation Iraqi Freedom

oilfield                                        [NATO] Activated friendly MEX. Opposite of KOBOLD)

OIPAAR                                                                Office of Industrial Personnel Access Authorization Review

OIR                                                                        other intelligence requirements

OIS                                                                        operating information system

OISP                                                                     overseas internal security program

OJT                                                                        on‑the‑job training

okay (system)                             system indicated is fully operative (cancels BENT)

OL                                                                          operating level; operating location

OLC                                                                       oak leaf cluster

OLF                                                                        outlying field

OLS                                                                       optical landing system

OLSS                                                                    overseas limited storage site

OMA                                                                      operation and maintenance, Army

OMAR                                                                   operation and maintenance, Army Reserve

OMARNG                                                             operation and maintenance, Army National Guard

OMB                                                                      Office of Management and Budget

OMF                                                                      officer master file; operation and maintenance of facilities

OMFBAA                                                              operation and maintenance of facilities budget activity account

OMFCA                                                                operation and maintenance of facilities cost account

OMFSCA                                                             operation and maintenance of facilities summary cost account

OMIS                                                                    office, management information systems

OML                                                                       order of merit list

OMPF                                                                    official military personnel file

OMPR                                                                    optical mark page reader

OMVTO                                                                office, motor vehicle transportation officer

on call                                                                  (adj)

on station                                   Informative call that unit/aircraft has reached assigned station)

onboard                                                              (adj, MW10)

ONC                                                                       operational navigation chart

on‑call                                       (DOD) 1. Term used to signify that a prearranged concentration, air strike, or final protective fire may be called for. 2. Preplanned, identified force or materiel requirements without designated time‑phased and destination information. Such requirements will be called forward upon order of competent authority, also call for fire, FM 6‑30)

on‑call resupply                           (DOD) A resupply mission planned before insertion of a special operations team into the operations area but not executed until requested by the operating team, also emergency resupply, FM 3‑05)

on‑call target                              (NATO) In artillery and naval fire support, a planned target other than a scheduled target on which fire is delivered when requested. [Note: the Army definition also applies to mortar fire.] See FM 6‑30)

one day's supply                          (DOD, NATO) A unit or quantity of supplies adopted as a standard of measurement, used in estimating the average daily expenditure under stated conditions. It may also be expressed in terms of a factor, for example, rounds of ammunition per weapon per day. Also called day of supply, 4‑0, FM 1‑02)

OneSAF                                      one semiautomated force; platform-independent, automated, composable, extensible, and interoperable software, used to create modeling and simulation programs with military applications; replaces legacy entity-based simulations such as BBS, ModSAF, JANUS, CCTT SAF, and AVCATT SAF

on‑hand                                                              (adj, MW9)

ONI                                                                        Office of Naval Intelligence

on‑order mission                          A mission to be executed at an unspecified time in the future. A unit with an on‑order mission is a committed force. The commander envisions task execution in the concept of operations; however, he may not know the exact time or place of execution. Subordinate commanders develop plans and orders and allocate resources, task‑organize, and position forces for execution, also be‑prepared mission (FM 5-0)

ONR                                                                       Office of Naval Research

ONS                                                                       operational need statements

on‑site                                                                (adj, adv, MW9)

OO                                                                         on order

OOAMA                                                                office, Ogden air material area

OOB                                          order of battle (FM 1‑02)

OOM                                                                      officers' open mess

OOSS                                                                   overseas operational storage site

OOTW                                                                  operations other than war (obsolete; replaced by SASO, which is also obsolete; see stability and reconstruction operations/civil support operations)

op                                                                           operate(d), operation(al), operator (use abbreviations only in graphics)

OP                                                                          observation post, operational project (FM 1‑02)

OPA                                                                       other procurement, Army

OpACK                                       operationally acknowledge (FM 3‑22.91; see also OpOUT, OpRDY, OpSTA, OpStatus

OPCODE                                                              operations code

OPCOM                                      operational command (NATO only, FM 1‑02)

OPCON                                       operational control (the authority delegated to direct those personnel needed to accomplish a specific mission, FM 1‑02)

OPD                                                                       officer distribution plan; officer professional development

OPED                                                                    other pay entry date

opening                                      Increasing in separation)

operating level of supply                (DOD) The quantities of materiel required to sustain operations in the interval between requisitions or the arrival of successive shipments. These quantities should be based on the established replenishment period (monthly, quarterly, and so on.), FM 4‑0)

operation                                    (DOD, NATO) 1. A military action or the carrying out of a strategic, operational, tactical, service, training, or administrative military mission. 2. The process of carrying on combat, including movement, supply, attack, defense, and maneuvers needed to gain the objectives of any battle or campaign, FM 3‑0)

operation annexes                        (DOD) Those amplifying instructions that are of such a nature, or are so voluminous or technical, as to make their inclusion in the body of the plan or order undesirable, FM 5-0)

operation exposure guide               (DOD) The maximum amount of nuclear radiation that the commander considers a unit may be permitted to receive while performing a particular mission or missions. [Note: the Army term is "operational exposure guidance."] Also called OEG, also radiation status, FM 3‑3‑1)

operation order                            (DOD, NATO) A directive [Note: the NATO definition adds "usually formal"] issued by a commander to subordinate commanders for the purpose of effecting the coordinated execution of an operation. [Note: Army definition adds, "Also called the five‑paragraph field order, it contains as a minimum a description of the task organization, situation, mission, execution, administrative and logistics support, and command and signal for the specified operation."] (FM 5-0)

operation plan                             (DOD) Any plan, except for the Single Integrated Operational Plan, for the conduct of military operations. Plans are prepared by combatant commanders in response to requirements established by the Chairman of the Joint Chiefs of Staff and by commanders of subordinate commands in response to requirements tasked by the establishing unified commander. Operation plans are prepared in either a complete format (OPLAN) or as a concept plan (CONPLAN) The CONPLAN can be published with or without a time‑phased force and deployment data (TPFDD) file. a. OPLAN—An operation plan for the conduct of joint operations that can be used as a basis for development of an operation order (OPORD) An OPLAN identifies the forces and supplies required to execute the CINC's Strategic Concept and a movement schedule of these resources to the theater of operations. The forces and supplies are identified in TPFDD files. OPLANs will include all phases of the tasked operation. The plan is prepared with the appropriate annexes, appendixes, and TPFDD files as described in the Joint Operation Planning and Execution System manuals containing planning policies, procedures, and formats. b. CONPLANAn operation plan in an abbreviated format that would require considerable expansion or alteration to convert it into an OPLAN or OPORD. A CONPLAN contains the CINC's Strategic Concept and those annexes and appendixes deemed necessary by the combatant commander to complete planning. Generally, detailed support requirements are not calculated and TPFDD files are not prepared. c. CONPLAN with TPFDD—A CONPLAN with TPFDD is the same as a CONPLAN except that it requires more detailed planning for phased deployment of forces (Army) Any plan for the preparation, execution, and assessment of military operations. Also called OPLAN, also operation order; time‑phased force and deployment data (FM 5-0)

operational approach                    The manner in which a commander attacks the enemy center of gravity, also direct approach; indirect approach (FM 3‑0)

operational art                             (DOD) The employment of military forces to attain strategic and/or operational objectives through the design, organization, integration, and conduct of strategies, campaigns, major operations, and battles. Operational art translates the joint force commander's strategy into operational design, and, ultimately, tactical action, by integrating the key activities at all levels of war, also strategic level of war; tactical level of war, FM 3‑0)

operational command                    (NATO) The authority granted to a commander to assign missions or tasks to subordinate commanders, to deploy units, to reassign forces, and to retain or delegate operational and/or tactical control as the commander deems necessary. Note: It does not of itself include responsibility for administration. [Note: this term is only used within the context of NATO operations.] Also called OPCOM, also operational control, FM 100‑8)

operational control                       (DOD) Command authority that may be exercised by commanders at any echelon at or below the level of combatant command. Operational control is inherent in combatant command (command authority) and may be delegated within the command. When forces are transferred between combatant commands, the command relationship the gaining commander will exercise (and the losing commander will relinquish) over these forces must be specified by the Secretary of Defense. Operational control is the authority to perform those functions of command over subordinate forces involving organizing and employing commands and forces, assigning tasks, designating objectives, and giving authoritative direction necessary to accomplish the mission. Operational control includes authoritative direction over all aspects of military operations and joint training necessary to accomplish the missions assigned to the command. Operational control should be exercised through the commanders of subordinate organizations. Normally this authority is exercised through subordinate joint force commanders and Service and/or functional component commanders. Operational control normally provides full authority to organize commands and forces and to employ those forces as the commander in operational control considers necessary to accomplish assigned missions; it does not, in and of itself, include authoritative direction for logistics or matters of administration, discipline, internal organization, or unit training. Also called OPCON, also assign; combatant command; combatant command (command authority); detachment; operational command; tactical control, FM 3‑0)

operational decontamination           (DOD, NATO) Decontamination carried out by an individual and/or a unit, restricted to specific parts of operationally essential equipment, materiel, and/or working areas, in order to minimize contact and transfer hazards and to sustain operations. This may include decontamination of the individual beyond the scope of immediate decontamination, as well as decontamination of mission‑essential spares and limited terrain decontamination, also decontamination; immediate decontamination; thorough decontamination, FM 3‑5)

operational environment                (DOD) A composite of the conditions, circumstances, and influences which affect the employment of military forces and bear on the decisions of the unit commander. Some examples are as follows: a. permissive environment—Operational environment in which host country military and law enforcement agencies have control as well as the intent and capability to assist operations that a unit intends to conduct. b. uncertain environment—Operational environment in which host government forces, whether opposed or receptive to operations that a unit intends to conduct, do not have totally effective control of the territory and population in the intended operational area. c. hostile environment—Operational environment in which hostile forces have control and the intent and capability to effectively oppose or react to the operations a unit intends to conduct, FM 3‑07)

operational fires                           The operational‑level commander's application of nonlethal and lethal weapons effects to accomplish objectives during the conduct of a campaign or major operation (FM 3‑0)

operational framework                   The arrangement of friendly forces and resources in time, space, and purpose with respect to each other and the enemy or situation. It consists of the area of operations, battlespace, and battlefield organization, also area of operations; battlefield organization; battlespace (FM 3‑0)

operational level of war                 (DOD) The level of war at which campaigns and major operations are planned, conducted, and sustained to accomplish strategic objectives within theaters or operational areas. Activities at this level link tactics and strategy by establishing operational objectives needed to accomplish the strategic objectives, sequencing events to achieve the operational objectives, initiating actions, and applying resources to bring about and sustain these events. These activities imply a broader dimension of time or space than do tactics; they ensure the logistic and administrative support of tactical forces, and provide the means by which tactical successes are exploited to achieve strategic objectives, also strategic level of war; tactical level of war, FM 3‑0)

operational military deception         (DOD) Military deception planned and executed by and in support of operational‑level commanders to result in adversary actions that are favorable to the originator's objectives and operations. Operational military deception is planned and conducted in a theater to support campaigns and major operations, also military deception, FM 3‑13)

operational pause                         A deliberate halt taken to extend operational reach or prevent culmination (FM 3‑0)

operational picture                       A single display of relevant information within a commander's area of interest (FM 3‑0)

operational psychological activities  Psychological operations that are conducted prior to, during war or conflict, and at the conclusion of open hostilities in a defined geographic area to promote the effectiveness of the area command's campaigns and strategies (FM 3‑05.20)

operational reach                         (DOD) The distance and duration across which a unit can successfully employ military capabilities, FM 3‑0)

operational readiness float             (Army) A quantity of selected class II and VII items authorized for use by direct support maintenance units in exchange with supported units if a like item cannot be repaired in a timely manner (FM 63‑2; Marine Corps) A pool of mission‑essential, maintenance significant end items used to provide replacement items for unserviceable, reparable end items which cannot be repaired in time to meet an operational commitment. Also called ORF)

operational reserve                       (DOD) An emergency reserve of men and/or materiel established for the support of a specific operation, FM 3‑0)

operationally ready                       (DOD) 1. A unit, ship, or weapon system capable of performing the missions or functions for which organized or designed. Incorporates both equipment readiness and personnel readiness. 2. Personnel available and qualified to perform assigned missions or functions, FM 63‑2)

operations process                       The activities performed during operations: plan, prepare, and execute with continuous assessment (FM 6‑0)

operations security                       (DOD) A process of identifying critical information and subsequently analyzing friendly actions attendant to military operations and other activities to: a. identify those actions that can be observed by adversary intelligence systems; b. determine indicators hostile intelligence systems might obtain that could be interpreted or pieced together to derive critical information in time to be useful to adversaries; and c. select and execute measures that eliminate or reduce to an acceptable level the vulnerabilities of friendly actions to adversary exploitation. [Note: the Army replaces "critical information" with "essential elements of friendly information."] Also called OPSEC, FM 3‑13)

operator's spraydown                    Decontamination of mission‑essential portions of one's equipment before continuing the mission. Operator's spraydown is most effective when done within 15 minutes of contamination. Those surfaces that must be touched on the exterior of the vehicle or equipment that must be used are decontaminated with onboard portable decontamination apparatus (such as the M‑11 or M‑13); FM 3‑5)

OPF                                                                       official personnel folder

OPFOR                                       opposing force (FM 1‑02)

OPLAN                                       operation plan (FM 1‑02)

OPLAW                                       operational law (FM 3‑21.20)

OPM                                                                      Office of Personnel Management; Office of Procurement and Materiel

OPMS                                                                   Officer Personnel Management System

OPNAVINST                                                      operational naval instruction (FM 90‑26)

opns                                          operations (FM 1‑02, FM 5-0‑1); use abbreviations only in graphics)

OPORD                                                                 operation order (not 'operations order', FM 1‑02)

OpOUT                                       operationally out (FM 3‑22.91; see also OpACK, OpRDY, OpSTA, OpStatus

OPP                                                                       officer professionalism program

opposed entry                             A military operation to enter an area against opposition, also air assault operation; airborne operation; amphibious operation; assault echelon (FM 90‑26)

opposing information                     Intentional or unintentional truth‑based information from any source that represents an opposing view (FM 3‑13)

OPR                                                                       operational project requirements

OpRDY                                       operationally ready (FM 3‑22.91; see also OpACK, OpOUT, OpSTA, OpStatus

OPREP                                                                  operational reporting

OPSEC                                       operations security (not operation security or operational security, FM 1‑02)

OPSKED                                                               operational schedule (FM 3‑21.20, FM 3‑90.6, FM 7‑92)

OpSTA                                       operationally stationary (FM 3‑22.91; see also OpACK, OpOUT, OpRDY, OpStatus

OpStatus                                    operation status (FM 3‑22.91; see also OpACK, OpOUT, OpRDY, OpSTA

OPSTR                                                                 operating strength

opt                                                                         optional (FM 90‑26 (use abbreviations only in graphics)

OPTASK                                     operational tasking (FM 1‑02)

OPTEC                                                                 Operation, Test and Evaluation Command

OPTEMPO                                                           operating tempo (FM 7‑0 and FM 7‑1)

OQR                                                                       officer's qualification record

OR                                                                          operational readiness

ORA                                           obstacle restricted area (FM 1‑02)

orange, international                                  used in TC 23‑14 and USAIC Pamphlet 350‑6 (EIB manual) Found no use of “ten‑mile orange,” “fluourescent orange,” or “fluorescent orange.”

orange, ten‑mile                                            (not found; see “international orange”)

orangewood                                                     (noun, adj, MW10)

ORB                                                                       Officer Record Brief

orbit(ing)                                    Directive (descriptive) call to hold on current or indicated position)

ORCEN                                                                 overseas records center

ord                                                                         ordnance (use abbreviations only in graphics)

order                                         (DOD, NATO) A communication, written, oral, or by signal, which conveys instructions from a superior to a subordinate. [Note: the NATO definition ends here.] In a broad sense, the terms "order" and "command" are synonymous. However, an order implies discretion as to the details of execution whereas a command does not, also fragmentary order; movement order; operation order; overlay order; warning order (FM 6‑0); a consolidation of individual publication requisitions or subscriptions)

orders (usage)                                                text style for commands and orders:
     Use all caps for commands and orders, for example,
FIRE WHEN READY.
     Use caps and lower case in quotation marks when the text uses terms such as "announces," "says," "calls,"
          "identifies," and so on, for example, the gunner announced, "Gun number one ready."

orders group                               A group assembled to receive a commander's orders. The basic composition of this group is normally prescribed in the standing operating procedures of the unit or formation concerned (FM 5-0)

ordnance                                                            explosives, chemicals, pyrotechnics, and similar stores such as bombs, guns and ammunition, flares, smoke, and napalm (DoD Dictionary)

ORE                                                                       operational readiness evaluation

ORF                                           operational readiness float (FM 1‑02)

org                                                                         organization; organize(d; use abbreviations only in graphics)

organic                                                                forming an integral element of a whole (Merriam‑Webster online Jul 2004), also inorganic and nonorganic)

organic                                      (DOD) Assigned to and forming an essential part of a military organization. Organic parts of a unit are those listed in its table of organization for the Army, Air Force, and Marine Corps, and are assigned to the administrative organizations of the operating forces for the Navy, also assign; attach; operational control, FM 6‑0)

organizational maintenance                    obsolete; use unit maintenance (from DA USAMC Materiel Readiness Support Activity re maintenance allocation charts (MACs), 25 Oct 1988)

organophosphate                         A phosphate‑containing organic compound. Organophosphates inhibit cholinesterase enzymes. G‑series and H‑series nerve agents are organophosphates, as are certain common insecticides (FM 3‑9)

ORI                                                                        operational readiness inspection

ORIT                                                                     operational readiness inspection test

ORLL                                                                     operational reports‑lessons learned

ORP                                           objective rally point (FM 1‑02)

ORSA                                                                    Operations Research/Systems Analysis

ORT                                                                       operational readiness training

ORTP                                                                    operational readiness training program

ORTT                                                                    Operational Readiness Training Test

OSA                                                                       Office of the Secretary of the Army; offshore acquisition; operational support airlift

OSB                                                                       operation support base (FM 3‑90.6); operational support base (FM 7‑98)

OSC                                                                       organizational supply code

OSD                                                                       Office of the Secretary of Defense; over, short, and damaged report

OSDIDBAD                                                         Office of the Secretary of Defense Identification Badge

OSHA                                                                    Occupational Safety and Health Act

OSI                                                                        Office of Strategic Information

OSIA                                                                     Office, Services and Information Agency

OSINT                                        open source intelligence (FM 1‑02)

OSP                                                                       offshore procurement

OSPE                                                                    organizational spare parts and equipment

OSR                                                                       Overseas Service Ribbon

OSREPL                                                               oversea replacement

OSRET                                                                 oversea returnee

OSS                                                                       operational storage site

OST                                                                       order ship time

OSUT                                                                    one station unit training

OT                                                                          observer‑target (FM 1‑02); occupational therapy‑therapist, operational test, overtime; a vehicle made by the former Soviet Union

OTAD                                                                    oversea terminal arrival date

OTAR                                                                    over‑the‑air rekeying (FM 3‑21.20, FM 7‑92)

OTE                                                                       operational test and evaluation

OTEA                                                                    Operational Test and Evaluation Agency

OTH                                                                       other than honorable conditions

OTIG                                                                     Office of The Inspector General

OTIS                                                                     ordnance telemetry instrumentation station

OTJAG                                                                  Office of The Judge Advocate General

OTM                                          on‑the‑move (FM 3‑21.10)

OTN                                                                       "Own the night" (slogan used by some special operations forces)

OTPMG                                                                Office of the Provost Marshal General

OTRA                                                                    other than Regular Army

OTSA                                                                    Operational Threat Support Activity

OTSG                                                                    Office of The Surgeon General

OTU                                                                       operational training unit

OUDP                                                                    Officer Undergraduate Degree Program

OUSARMA                                                          Office of the United States Army Attaché

out                                            A procedure word (proword) meaning, "This is the end of my transmission to you and no answer is required or expected." (Since "over" and "out" have opposite meanings, they are never used together.; FM 24‑19)

 

out‑                                                                      prefix; in a manner that exceeds or surpasses and sometimes overpowers or defeats; examples include (Merriam‑Webster's [Online] Collegiate Dictionary)—

out achieve                    outbelch             out brawl
out charge                      out dance                       outdesign
outdrive             outfight                          outintrigue
outlast               outmaneuver                   outpass
outplay                          outpower                        outprice
outrate                          outsoar                          outscheme
outsing                          outsparkle                      outswear
outthrow                        outwait                          outwrite
out bargain                     out bluff             out bulk
out climb                        out dazzle                      outdrag
outduel                          outhit                            outjump
outleap                          outmanipulate                 outperform
outplot                           outpray                          outproduce
outrebound                     outgrow                         outscoop
outsit                            outspeed                        outswim
outtrade             outwalk                          outyell
outbid                outbox                           out buy
out coach                       outdebate                      outdress
outearn                          outhunt                          outkick
outlearn             outmarch                        outpitch
outpolitick                      outpreach                       outpromise
outreproduce                  outrush                          outscore
outskate            outsprint                        outtalk
outvie                            outwatch                       outyield
out brag             outmatch                       out compete
outdeliver                       outdrink             outeat
outhustle                        outkill    outman
outmuscle                       outorganize         outpopulate
outpoll               out act              outpunch
outrival                          outsail               outshout
outsoar                          outstride            outthink
outvote                          outwrestle

 

out (direction)                             Informative call indicating a turn to a cold aspect relative to a known threat)

out of                                                                   (preposition, Merriam‑Webster online, 2001) indicates direction or movement from within to without something. poor usage, though. Use 'from' or other single word preposition if you can

outage                                                                 (noun, MW9)

outflank                                                              (trans verb, MW9)

outgoing                                                             (adj, MW9)

outlaw**                                    Informative call that a BOGEY has met point of origin criteria for ROE)

outload                                                                (noun, adj)

out‑load                                                             (verb)

outsize                                                                (noun, adj, adv, MW9)

over                                          (NATO) In artillery and naval fire support, a spotting or an observation, used by a spotter or an observer, to indicate that a burst(s) occurred beyond the target in relation to the spotting line. [Note: the Army definition also applies to mortar fire], FM 6‑30 (Army) 1. A procedure word meaning, "This is the end of my transmission to you and a response is necessary. Go ahead; transmit." (FM 24‑19) 2. In direct fire, a sensing that a round or burst of rounds went above the intended target and landed beyond the target (FM 3‑20.12)

overadjust                                                         (verb, MW9)

overall                                                                  (noun, adj, adv, MW9)

overboots                                                          (noun, Third New International Dictionary, Unabridged)

overflight                                                           (noun, MW9)

overgarment                                                    (noun, MW9)

overhead                                                            (noun, adj, adv, MW9)

overland                                                             (adv, MW9)

overlap tell                                 (NATO) The transfer of information to an adjacent facility concerning tracks detected in the adjacent facility's area of concern, also track telling (FM 1‑02)

overlay                                      (DOD; This definition applies to analog, that is, hand drawn, overlays only) A printing or drawing on a transparent or semi‑transparent medium at the same scale as a map, chart, and so on., to show details not appearing or requiring special emphasis on the original (Army) On digital displays, a set of graphical data that can be placed or removed from another set of graphical data without causing distortion of or damage to either set of graphical data (FM 5-0)

(Editor: This definition covers all overlay media) An overlay is a set or group of physical or electronic, graphical or textual (or both) data, that is overlaid either physically or electronically on a base consisting either of a physical or electronic representation of a drawing, a map, or a photograph.
In the case of a physical base and overlay, each layer should have a pair of identically placed registration marks (typically a circle and cross), one in each of either two opposing corners)

overlay order                               A technique used to issue an order (normally a fragmentary order) that has abbreviated instructions written on an overlay (FM 5-0)

overpass                                                            (trans verb, Merriam‑Webster's [Online] Collegiate Dictionary, 14th century, British. 1. To pass across, over, or beyond.)

overpressure                                                    the pressure resulting from the blast wave of an explosion; referred to as "positive" when it exceeds atmospheric pressure and vice versa

overseas joint campaign                consists of three types of operations:
     1.  Offense
     2.  Defense
     3.
  Stability and reconstruction

overt operation                            (DOD) An operation conducted openly, without concealment, also clandestine operation; covert operation, FM 3‑05)

overtask                                                             (verb)

overview                                                            (noun, MW9)

overwatch                                  (trans verb, MW9; also, Army, Marine Corps) 1. A tactical movement technique in which one element is positioned to support the movement of another element with immediate fire. 2. The tactical role of an element positioned to support the movement of another element with immediate fire, also support by fire, FM 3‑90)

OVM                                                                      on‑vehicle materiel (FM 90‑26); operator's vehicle material (FM 3‑22.27)

OVUREP                                                               overseas unit replacement system

OW                                                                        orderwire

OWR                                                                      obligated war reserves

OWRMS                                                               other war reserve materiel stocks

oz                                                                           ounce (FM 3‑21.8 (use abbreviations only in graphics)