gunner's primary sight (GPS)

gunner’s auxiliary sight (GAS)

gunner’s sight

co-pilot/gunner stabilized sight

gunner's sight eyepiece display

Global Positioning System (GPS)

GPS hardware

GPS receiver

Defense Advanced GPS Receiver (DAGR; `dagger`)

embedded global-positioning and inertial-navigation system (EGI) / embedded GPS/INS

enhanced global positioning and inertial navigation system (EGI) / enhanced GPS/INS

GPS/Plotter

GPS-guided

global positioning system-guided munitions (GPS-guided)

GPS hold

kinematic GPS

GPS spoofing

GPS receiver applications module selective availability

GPS receiver anti-spoofing module

front sight (fore / muzzle sight)

sight, to take a (careful) sight

day-sight (day sight)

modular integrated display and sight helmet (Modular Integrated Display-And-Sight Helmet)

officer of primary responsibility

primary (fire) position

primary arm

primary armament

primary burn

primary control surface

primary sector of fire

primary high explosive

primary military occupational specialty (MOS)

primary mission