What is required from a pilot if other aircraft are in the circuit while on the downwind leg?

When a pilot is on the downwind leg and other aircraft are in the circuit, it is essential for them to receive sequencing instructions from air traffic control (ATC). This is because ATC is responsible for managing the flow of air traffic around the airport to ensure safety and efficiency in landing and takeoff operations. By obtaining sequencing instructions, the pilot can be informed of their position in relation to other traffic and understand when it is appropriate for them to descend, approach, and land.

Receiving these instructions helps to prevent potential conflicts with other aircraft that may be landing or taking off, ensuring that all aircraft can operate safely within the same airspace. This practice is a fundamental aspect of maintaining safety in crowded airspace situations.

While options like informing ATC of intentions or waiting for a gap in traffic may seem reasonable, they do not provide the structured guidance necessary to safely integrate into the circuit with other aircraft. Immediately requesting to land, without coordination from ATC, could lead to misunderstandings and unsafe situations. Therefore, following ATC's directions and receiving proper sequencing is paramount in such scenarios.