🔍 Key Concepts

• Pilot vessel identity signal in sound signals (Navigation Rules, Annex II / Rule 35 for vessels in or near restricted visibility) • When a pilot vessel is engaged in pilotage duty versus when it is not • How sound signals differ for underway, at anchor, not under command, aground, or being towed

💭 Think About

• First, recall what special sound signal a pilot vessel uses to identify itself and under what general conditions that identity signal is used. • Then, think about which of the listed situations could realistically occur while the pilot vessel is still actively on pilotage duty, rather than simply being a powerless or passive vessel. • For each choice, ask: would this vessel still be acting in its special role as a pilot vessel, or is it now in a different status with different sound signal requirements?

✅ Before You Answer

• Verify in the Navigation Rules which vessel types have special identity signals in restricted visibility and what those signals are. • Check which conditions (e.g., underway making way, underway but not making way, at anchor, not under command, being towed) change a vessel’s required sound signals. • Confirm for each listed condition whether the Rules still refer to it as a pilot vessel engaged on pilotage duty, or primarily by another status like not under command or aground.