When being overtaken, what signal should you respond with?

• A. The same signal (two short blasts)
• B. One long blast
• C. Three short blasts
• D. No signal

Answer: (A)

When a vessel is overtaking another, there is a standard exchange of signals to coordinate the passing. The overtaking vessel uses two short blasts to indicate its intention to pass. The vessel being overtaken should respond with the same two short blasts to acknowledge and show that it understands and will not impede the passing. This mutual acknowledgment reduces misunderstanding and helps prevent a collision, especially in limited visibility or busy waters. After the acknowledgment, the overtaking vessel proceeds to pass safely, and the stand-on vessel maintains its course and speed. The other signals listed don’t convey this clear acknowledgment, and not signaling could lead to confusion.