Plain English Meaning

The cockpit gauge that tells the pilot how fast the airplane is moving through the air around it.

Full Definition

A pitot-static flight instrument that displays the airplane's speed through the surrounding air, expressed in knots or miles per hour. It works by comparing ram air pressure from the pitot tube against static (ambient) air pressure from the static port, and converting the difference into a speed reading on a calibrated dial.

Context Anchor

Seen on the and checked during , , , , and .