Upon being cleared for an ILS approach after radar vectors, what is the pilot’s priority?

The priority for a pilot cleared for an Instrument Landing System (ILS) approach after receiving radar vectors is to establish on the published approach segment before beginning a descent. This is crucial because the ILS approach is a precision approach that relies on specific lateral and vertical guidance provided by the system. By ensuring the aircraft is properly aligned with the approach segment, the pilot can safely navigate the aircraft along the intended path to the runway.

Establishing on the approach segment ensures that the pilot is adhering to the correct altitude and positional requirements as outlined in the published procedure, which ultimately enhances safety and compliance with regulations. Descending before being properly established can lead to an unstable approach, increased risk of terrain conflict, and other hazards.

Maintaining appropriate ground speed and changing course to minimize time to touchdown are secondary considerations and should only be done within the parameters set forth by the ILS approach procedure. Thus, prioritizing the correct approach segment is fundamental to the conduct of a safe, accurate ILS landing.