What is the squawk if a pilot intends to bingo?

When a pilot intends to "bingo," it refers to a situation where they are indicating that they are low on fuel and need to return to base or a safe landing location. In aviation, squawk codes are four-digit codes assigned to transponders to transmit information to air traffic control, and certain squawk codes represent specific situations or intentions.

The squawk code of 71 is specifically designated for emergencies or critical situations like low fuel, which is why it is the correct answer in this context. This code helps air traffic controllers quickly identify the urgency of the pilot's situation. Understanding the significance of squawk codes is essential for effective communication in air traffic control and maintaining safety in operations.