During a CV-1 approach, if Marshal implements a delta four, what should the pilot of Aircraft 503 do?

In the context of a CV-1 approach, when the marshal implements a delta four, it indicates a specific action that affects the aircraft's altitude and position. The term "delta four" typically requires the aircraft to maintain a particular altitude while preparing for further instructions or transitions in the approach phase.

By choosing to level off at Angels 9, the pilot of Aircraft 503 is adhering to the required altitude directive necessary for the procedure. This action keeps the aircraft at a safe and controlled altitude, avoiding unnecessary climbs or descents that could lead to complications during potentially congested airspace.

Furthermore, maintaining this altitude can facilitate better spacing between approaching aircraft, which is essential for smooth operations during an air traffic control scenario, particularly during a carrier approach where multiple aircraft may be involved.

Understanding these procedural aspects is key for pilots under these conditions, as following instructions accurately helps ensure operational safety and effectiveness during the landing approach.