grid reference code

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

grid reference box

grid reference system

military grid reference system (MGRS)

call for fire using `snail` grid reference

grid reference

grid zone / grid-zone

grid zone designation / Grid Zone Designator

JAN grid / Joint Army-Navy grid

map reference code

runway reference code

aerodrome reference code

reference code

aerodrome reference code panel

grid-square color code

guidance reference system

gyroscopic reference unit (GRU)

lay reference number

map reference

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