What should you do if another boat signals their intention to pass you from astern?

When another boat signals its intention to pass from behind, the proper response is to acknowledge their signal in agreement and maintain your current course and speed. This is vital for ensuring safety and clear communication on the water. By answering with the same signal, you confirm that you understand their intention to pass and are not making any sudden movements that could confuse them or lead to an accident.

Maintaining your course and speed allows the other vessel to make their maneuver safely without unexpected changes that could lead to collisions. It promotes predictability in navigation, which is essential in busy waterways. This response underscores the importance of proper signaling and maintaining situational awareness in boating to ensure everyone's safety.