Navigational flight instruments

pressure measurement instrument used to measure fluid flow velocity

ground-based visual aid for landing

instrument for determining the pitch and roll of an aircraft

In aviation, a variometer – also known as a rate of climb and descent indicator (RCDI), rate-of-climb indicator, vertical speed indicator (VSI), or vertical velocity indicator (VVI) – is one of the flight instruments in an aircraft used to inform the pilot of the rate of descent or climb. It can be calibrated in metres per second, feet per minute (1 ft/min = 0.00508 m/s) or knots (1 kn ≈ 0.514 m/s), depending on country and type of aircraft. It is typically connected to the aircraft's external static pressure source.

device which measures altitude above the terrain presently beneath an aircraft or spacecraft

instrument used in an aircraft to display the craft's airspeed, typically in knots, to the pilot

component of a modern aircraft avionics

aircraft navigation method

modern aircraft instrument

flight instrument used to inform the pilot of an aircraft's heading, especially at landing

flight instrument