Plain English Meaning

The required altitudes and speeds you must hit at certain points when flying an instrument approach. They are not suggestions — they are rules printed on the approach chart that you have to meet.

Full Definition

Published altitude, speed, or crossing requirements that an aircraft must meet at specific points along an instrument approach procedure. These are charted on the approach plate as fixed restrictions the pilot and the aircraft's flight management system must satisfy during the descent and approach.

Context Anchor

Seen during vertical navigation planning, when checking whether the planned descent will meet the requirements on the instrument approach chart.