If a signal Delta is given, aircraft below what altitude will continue the approach?

When the signal Delta is given, it indicates that aircraft below a certain altitude should continue their approach. The standard protocol for dealing with signal Delta indicates that this altitude threshold is set at 7,000 feet. This means that any aircraft operating below this altitude are cleared to proceed with their approach to landing, ensuring safe and efficient air traffic flow.

Understanding this protocol is critical for air traffic controllers to manage the vertical separation needed between approaching and departing aircraft, as well as to maintain safety during the landing process. The 7,000-foot threshold is part of established air traffic control guidelines designed to standardize operations and minimize the risk of accidents during the critical phases of flight.

The other altitude options — 5,000 feet, 6,000 feet, and 8,000 feet — do not align with the regulations set for when the Delta signal is used and therefore do not serve as the correct threshold for continuing an approach under these circumstances.