Remove Knot Remove Tarmac Remove True Airspeed
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The Pitot-Static System: How It Works

Pilot Institute

To find True Airspeed (TAS), youll need to account for these effects. When your aircraft is parked on the tarmac, the pitot-static system faces other risks. During takeoff, the Pilot Not Flying (PNF) calls out airspeed, usually at 80 knots, and the Pilot Flying (PF) verifies it matches their ASI.