pin-point reference

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

arming pin; safety pin

firing pin retaining pin

track pin retaining pin

belt-feed pawl pin / belt feed pawl pin

reference diversion point

target reference point (TRP)

fictitious reference point

real reference point

aerodrome reference point (ARP)

reference noise measurement point

take-off reference noise measurement point

reference point

linear reference point

visual reference point

firing point / firing pin

pin point

pin-point bombing

pin-point concentration

pin-point target

ballistic impact point (BIP) / ground (predicted) impact point (PIP)

target approach point; initial point (IP)

triangulation point (trig point)

objective rally point / objective rallying point

point-to-point communication

point-to-point flight

near-side rally point / near side rally point

far-side rally point / far side rally point

grid reference box

grid reference system

guidance reference system

gyroscopic reference unit (GRU)