instantaneous radius of the flight path

instantaneous vertical speed indicator / instantaneous vertical-speed indicator (IVSI)

glide path transmitter / glide-path transmitter

flight path

intercept flight path

flight path angle

flight path direction

flight path error

flight path monitoring system

flight path noise measurement point

noise and flight path monitoring installation (NFPMI)

flight path angle envelope

flight path envelope

instantaneous burst

instantaneous detonating fuse

instantaneous action fuze

instantaneous percussion fuze

instantaneous radiation

instantaneous vertical velocity computer (IVVC)

instantaneous motion of a fluid element

instantaneous rate of flow

instantaneous velocity

instantaneous frequency measurement (IFM)

effective casualty(-producing) radius

radius of safety

turning radius

caliber radius head (of ammunition)

caliber-radius head

effective fragmentation radius

nominal radius

standard radius

combat radius (CR)

combat radius capability