visual approach slope indicator system (vasis)

abbreviated visual approach slope indicator system (avasis)

visual slope aid

beyond visual range / beyond-visual-range (BVR)

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

abbreviated visual approach

visual approach

visual approach chart

abbreviated precision approach path indicator (apapi)

precision approach path indicator (papi)

antiaircraft artillery visual cueing system

visual cueing system

visual target acquisition system

computer-generated image visual system

visual airborne target locator system

visual precision fire control system

Degraded Visual Environments Pilotage System

indicator system

fire extinguishing system indicator disc

back-up hydraulic system failure indicator

continuously variable slope delta (CVSD)

forward slope

front slope

rear slope

reverse slope

reverse slope defense

slope distance

steep slope

glacis slope

forward side slope ground clearance

max side slope

side-long slope

centering slope