vertical gyro indicator

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

gyro-compass / gyro-unit

gyro-unit / gyro-compass

artificial horizon (gyro horizon/ attitude indicator)

gyro course indicator

artificial horizon / attitude indicator, gyro-horizon

attitude indicator / artificial horizon, gyro-horizon

gyro-horizon / artificial horizon, attitude indicator

gyro vertical

master gyro vertical

vertical scale indicator

vertical speed indicator (VSI)

azimuth gyro

bootstrap gyro

bootstrap gyro system

gyro gunsight

radar-ranging gyro gunsight

upper proximity dot (of a gyro gunsight)

bank-and-climb gyro unit

remote indicating automatic gyro horizon

roll-rate gyro

yaw-rate gyro

air-driven gyro

directional gyro

electrically-driven gyro

flight gyro

gyro

gyro flux(-)gate compass

gyro horizon

gyro stabilized flux(-)gate compass

gyro torquer

gyro unit