Up (Pitch 90 deg) / Down (Pitch -90 deg) Reference

OSD Symbol to show when pitch is approaching vertical (90 deg, U) and D for nose down (-90 deg, D)

attitude-and-heading reference system / attitude and heading reference system (AHRS)

Accelerometer - g (deg)

deg

Gyroscope - deg/s

Max Vel (deg/s)

Reset Z axis, offset X deg

tie down / tie-down

cargo tie-down / freight tie-down

freight tie-down / cargo tie-down

pitch down

grid reference box

grid reference system

guidance reference system

gyroscopic reference unit (GRU)

lay reference number

map reference

map reference code

military grid reference system (MGRS)

NATO Master Cross Reference List (NMCRL) (logistics)

numbered reference position system

reference

reference diversion point

reference data

reference number (order / message / report)

stabilization reference package (SRP)

target reference point (TRP)

terms of reference (TOR)

World Geographic Reference System (WGRS); georef

Army doctrine reference publication (ADRP)

reference azimuth

fictitious reference point