You are here


O&M: Operating and Maintenance (USCG5)

O/D: Origin and Destination (OST3)

O/D: Overdrive (TII1)

O21: Ocean21 (FAA20)

O3: Ozone (BTS2)

OA: Operating Administration (DOT2)

OAAA: Outdoor Advertising Association of America (FHWA18)

OAC: Office of Outdoor Advertising Control (FHWA18)

OAG: Official Airline Guide (BTS11)

OAI: Office of Airline Information (BTS11)

OAK: Metropolitan Oakland International Airport (FAA11)

Oakie Blower: Air scoop on air intake to increase power. (ATA1)

OAL: Over-All-Length (Of the Vehicle) (TII2) (TII1)

OALT: Operational Acceptable Level of Traffic (FAA20)

OAM: Office of Acquisition Management (NHTSA7)

OAMP: Off-Line Aircraft Management Program (FAA20)

OAP: Oceanic Automation Program (FAA19)

OAS: Oceanic Automation System (FAA20)

OAS: Organization of American States (FHWA18)

OASD: Office of the Assistant Secretary of Defense (AIA1)

OASIS: Operational and Supportability Implementation System (FAA19)

OATS: Office Automation Technology Services (FAA20)

OAW: Off-airway Weather Station (FAA20)

OBC: Onboard Computer (FRA5)

OBD: Operation Buckle Down (NHTSA6)

Object: Includes, but is not limited to above ground structures, people, equipment, vehicles, natural growth, terrain, and parked aircraft. (FAA12)

Object Class: As the term is used in expense classification, an object is an article or service obtained. An object class is a grouping of expenses on the basis of goods or services purchased. The object classes include salaries and wages, fringe benefits, services, materials and supplies, and other expenses as defined in Section 7.2, Volume II of the Uniform System of Accounts (USOA). (FTA1)

Object Free Area: A two dimensional ground area surrounding runways, taxiways, and taxilanes which is clear of objects except for Navigation Aids (NAVAIDs) and objects whose location is fixed by function. (FAA12)

Objectives: Specific, measurable statements related to the attainment of goals. (FHWA21)

Objects Not Fixed: Objects that are movable or moving but are not motor vehicles. Includes pedestrians, pedalcyclists, animals, or trains (e.g., spilled cargo in roadway). (NHTSA3)

Obligation: The Federal government's legal commitment (promise) to pay or reimburse the States or other entities for the Federal share of a project's eligible costs. (FHWA21)

Obligation Limitation: A restriction, or "ceiling" on the amount of Federal assistance that may be promised (obligated) during a specified time period. This is a statutory budgetary control that does not affect the apportionment or allocation of funds. Rather, it controls the rate at which these funds may be used. (FHWA21)

Obligational Authority: The total amount of funds that may be obligated in a year. For the Federal-Aid Highway Program this is comprised of the obligation limitation amount plus amounts for programs exempt from the limitation. (FHWA21)

Obligations Under Capital Leases (Current and Noncurrent): Liability applicable to property obtained under capital leases. (BTS4)

Obstacle: An existing object, object of natural growth, or terrain at a fixed geographical location or which may be expected at a fixed location within a prescribed area with reference to which vertical clearance is or must be provided during flight operation. (FAA4) (FAA8)

Obstacle Free Zone: The obstacle free zone (OFZ) is a three dimensional volume of airspace which protects for the transition of aircraft to and from the runway. The Obstacle Free Zone (OFZ) clearing standard precludes taxiing and parked airplanes and object penetrations, except for frangible navigation aid (NAVAID) locations that are fixed by function. Additionally, vehicles, equipment, and personnel may be authorized by air traffic control to enter the area using the provisions of Order 7110.65, Air Traffic Control, paragraph 3-5. The runway OFZ and when applicable, the inner-approach OFZ, and the inner-transitional OFZ, comprise the OFZ. (FAA4)

Obstruction: Any object/obstacle exceeding the obstruction standards specified by Federal Aviation Regulations (FAR) Part 77, Subpart G. (FAA4) (FAA8)

Obstruction Accident: An accident/incident consisting of striking: 1) A bumping post or a foreign object on the track right-of-way; 2) A highway vehicle at a location other than a highway-rail crossing site; derailed equipment; or 3) A track motorcar or similar work equipment not equipped with Association of American Railroad couplers, and not operating under train rules. (FRA2)

Obstruction Light: A light or one of a group of lights, usually red or white, frequently mounted on a surface structure or natural terrain to warn pilots of the presence of an obstruction. (FAA8)

Obstruction to Air Navigation: An object of greater height than any of the heights or surfaces presented in Subpart C of Federal Aviation Regulations (FAR) Part 77. (FAA12)

OC4J: Oracle Containers for Java Enterprise Edition (FAA20)

OCA: Oceanic Control Area (FAA20)

OCC: Operations Control Center (FAA20)

OCCI: Office of Communications and Consumer Information (NHTSA7)

Occupancy: The number of persons, including driver and passenger(s) in a vehicle. Nationwide Personal Transportation Survey (NPTS) occupancy rates are generally calculated as person miles divided by vehicle miles. (FHWA3)

Occupant: Any person in or on a motor vehicle in transport. Includes the driver, passengers, and persons riding on the exterior of a motor vehicle (e.g., a skateboard rider holding onto a moving vehicle). Excludes occupants of parked cars unless they are double parked or motionless on the roadway. (BTS11)

Occupational Fatality: Death resulting from a job-related injury. (BTS11)

Occupational Illness: Any abnormal condition or disorder caused by environmental factors associated with a worker's employment, but not the result of an injury. (FRA3)

Occupied Caboose: A rail car being used to transport non-passenger personnel. (49CFR171)

OCDB: Oracle Content Database (FAA20)

Ocean Bill of Lading: A receipt for the cargo and a contract for transportation between a shipper and the ocean carrier. It may also be used as an instrument of ownership which can be bought, sold, or traded while the goods are in transit. (USTTA1)

Ocean Freight Differential: The amount by which the cost of the ocean freight bill for the portion of commodities required to be carried on U.S. flag vessels exceeds the cost of carrying the same amount on foreign flag vessels. When applied to agricultural commodities shipped under Food for Peace, OFD is the amount paid by the Commodity Credit Corporation. (USTTA1)

Ocean Going Container: Usually made of steel, it is a large rectangular box designed for easy lift on/off by cranes. (BOC3)

Oceangoing Vessels: Includes U.S. flag, privately-owned merchant fleet of oceangoing, self-propelled, cargo-carrying vessels of 1,000 gross tons or greater. (BTS14)

Oceanic Airspace: Airspace over the oceans of the world, considered international airspace, where oceanic separation and procedures per the International Civil Aviation Organization are applied. Responsibility for the provisions of air traffic control service in this airspace is delegated to various countries, based generally upon geographic proximity and the availability of the required resources. (FAA4)

Oceanic Display and Planning System: An automated digital display system which provides flight data processing, conflict probe, and situation display for oceanic air traffic control. (FAA4)

Oceanic Navigational Error Report: A report filed when an aircraft exiting oceanic airspace has been observed by radar to be off course. ONER reporting parameters and procedures are contained in Order 7110.82, Monitoring of Navigational Performance In Oceanic Areas. (FAA4)

Oceanic Published Route: A route established in international airspace and charted or described in flight information publications, such as Route Charts, Department of Defense (DOD) En Route Charts, Chart Supplements, NOTAM's, and Track Messages. (FAA4)

Oceanic Transition Route: Route established for the purpose of transitioning aircraft to/from an organized track system. (FAA4)

OCIP: Owner Controlled Insurance Program or Plan (FTA5)

OCMI: Officer In Charge, Marine Inspection (USCG1)

OCP: Overland Common Point (MARAD2)

OCRR: Old Colony Railroad Rehabilitation (FTA5)

OCS: Occupancy Control System (FRA5)

OD: Office Director (NHTSA7)

OD: Outside Diameter (TII1)

ODAL: Omnidirectional Approach Lighting System (FAA20)

ODALS: Omnidirectional Approach Lighting System (FAA4) (FAA17) (FAA19)

ODAPS: Oceanic Display and Planning System (FAA20)

ODAPS: Oceanic Display and Processing Station (FAA20)

ODI: Office of Defects Investigation (NHTSA7)

ODL: Oceanic Data Link (FAA20)

ODMS: Operational Data Management System (FAA19)

ODRA: Office of Dispute Resolution for Acquisition (FAA20)

ODS: Operational Data Store (FAA20)

ODS: Operating-Differential Subsidy (MARAD4)

ODSA: Operating-Differential Subsidy Agreement (MARAD4)

OE: Obstacle Evaluation (FAA20)

OE/AAA: Obstruction Evaluation/Airport Airspace Analysis (FAA20)

OECD: Organization for Economic Cooperation and Development (FHWA18)

OEI: One Engine Inoperative (14CFR1)

OEM: Original Equipment Manufacturer (FAA20)

OEMS: Office of Emergency Medical Services (NHTSA7)

OEP: Operational Evolution Plan (FAA20)

OEP: Operational Evolution Partnership (FAA20)

OETS: Obstacle Evaluation Tracking System (FAA20)

OFA: Object Free Area (FAA12)

OFCCP: Office of Federal Contract Compliance Programs (FHWA18)

OFD: Ocean Freight Differential (MARAD4) (USTTA1)

OFDPS: Offshore Flight Data Processing System (FAA20)

OFE: Other Freeway and Expressway (FHWA19)

Off Course: A term used to describe a situation where an aircraft has reported a position fix or is observed on radar at a point not on the air traffic control (ATC) approved route of flight. (FAA4)

Off Route Vector: A vector by Air Traffic Control (ATC) which takes an aircraft off a previously assigned route. Altitudes assigned by ATC during such vectors provide required obstacle clearance. (FAA4)

Off-Road Vehicular Area: An area for the testing of, or use by, vehicles that are designed to travel across the terrain. (DOI4)

Office of Management and Budget: OMB's predominant mission is to assist the President in overseeing the preparation of the federal budget and to supervise its administration in Executive Branch agencies. In helping to formulate the President's spending plans, OMB evaluates the effectiveness of agency programs, policies, and procedures, assesses competing funding demands among agencies, and sets funding priorities. OMB ensures that agency reports, rules, testimony, and proposed legislation are consistent with the President's Budget and with Administration policies. In addition, OMB oversees and coordinates the Administration's procurement, financial management, information, and regulatory policies. In each of these areas, OMB's role is to help improve administrative management, to develop better performance measures and coordinating mechanisms, and to reduce any unnecessary burdens on the public. (FHWA21)

Office of the Secretary of Transportation: The Department of Transportation is administered by the Secretary of Transportation, who is the principal adviser to the President in all matters relating to Federal transportation programs. The Secretary is assisted in the administration of the Department by a Deputy Secretary of Transportation, a Associate Deputy Secretary, the Assistant Secretaries, a General Counsel, the Inspector General, and several Directors and Chairmen. (OFR1)

Officer In Charge Marine Inspection: A person from the civilian or military branch of the Coast Guard designated as such by the Commandant and who under the supervision and direction of the Coast Guard District Commander is in charge of a designated inspection zone for the performance of duties with respect to the enforcement and administration of Title 52, Revised Statutes, acts amendatory thereof or supplemental thereto, rules and regulations thereunder, and the inspection required thereby. (49CFR171)

Offset Parallel Runway: Staggered runways having centerlines which are parallel. (FAA4)

Offshore: That geographic area that lies seaward of the coastline. In general, the coastline is the line of ordinary low water along with that portion of the coast that is in direct contact with the open sea or the line marking the seaward limit of inland water. (49CFR195) (DOE3) (DOE5)

Offshore Control Area: That portion of airspace between the U.S 12-mile limit and the Oceanic Control Area/Flight Information Region (CTA/FIR) boundary within which air traffic control is exercised. These areas are established to permit the application of domestic procedures in the provision of air traffic control services. Offshore Control Area is generally synonymous with Federal Aviation Regulations, Part 71, Subpart E, "Control Areas and Control Area Extensions." (FAA4)


A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | P | Q | R | S | T | U | V | W | X | Y | Z