OC. . . . . . . . . . . . . . . . . . . . Over Current
OEM . . Original Equipment Manufacturer
OF . . . . . . . . . . . . . . . . . Over Frequency
OGV . . . . . . . . . . . . . Outlet Guide Vanes
OHP . . . . . . . . . . . . . . . Overhead Panel
OHU . . . . . . . . . . . . . . . . . Overhead Unit
OIT . . . . . . . . . . . . Oil Inlet Temperature
OM . . . . . . . . . . . . . . . Operating Manual
OM . . . . . Outer Marker - beacon on ILS approach
OMS . . . . Onboard Maintenance System
OOOI . . Out-Off-On-In-ACARS automatic reporting scheme
OP . . . . . . . . . . . . . . . . . . . . . . . . . . Open
OPER . . . . . . . . . . . . . . . . . . . Operation
OPN . . . . . . . . . . . . . . . . . . . . . . . . Open
OPS. . . . . . . . . . . . . . . . . . . . Operations
OPU . . . . . . . . . . . . . . . . . Oil Pump Unit
ORIDE . . . . . . . . . . . . . . . . . . . . Override
ORT. . . . . . Owner Requirements Table - SATCOM term
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