hovering and low-speed indicator

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

low-flying, low-speed drone

static ceiling (the highest altitude at which the helicopter is capable of hovering in standard atmosphere) / hover ceiling

vertical speed indicator (VSI)

supersonic speed (exceeds speed of sound / Mach 1)

variable-speed with speed control

Nr gauge (Nr = speed of rotation) / rotor speed sensor

Motor PWM speed separated from PID speed

low-speed aileron

low-RCS target / low-radar-cross-section target

low flying aircraft / low-flying aircraft

observation and fields of fire, avenues of approach, key and decisive terrain,obstacles, and cover and concealment (OAKOC)

vehicle position and direction indicator

turn-and-bank indicator

course and speed calculator

fourth and fifth speed gear synchronizer

wind speed and direction

high- and low-altitude surveillance

surveillance, high- and low-altitude surveillance

airborne targeting low altitude navigation thermal imaging and cueing (system)

low smoke and fume

low smoke and fume cable

Low Altitude Authorization and Notification Capability (LAANC)

Low Altitude Authorization and Notification Capability system (LAANCs)

air-flow indicator

artificial horizon (gyro horizon/ attitude indicator)

desiccant indicator

gyro course indicator

indicator console

indicator lamp

indicator light

indicator system