🔍 Key Concepts

• Rule 35 – Sound Signals in Restricted Visibility (Navigation Rules) • Special signal for a pilot vessel on duty in or near an area of restricted visibility • Difference between being underway, making way, and at anchor

💭 Think About

• Ask yourself: Does the pilot vessel’s special identity signal depend on whether she is making way, simply underway but stopped, or at anchor? • Compare what a normal vessel at anchor sounds in fog with what a pilot vessel engaged on pilotage duty must sound. Are they exactly the same, or is there something extra? • Look at the wording of Rule 35 for pilot vessels. Does it say "may" or "shall," and does it limit the signal to only one condition of movement?

✅ Before You Answer

• Verify exactly what Rule 35 says about pilot vessels engaged on pilotage duty in restricted visibility. • Check whether the rule makes a distinction between making way, underway but not making way, and at anchor for pilot vessels. • Confirm whether, when at anchor, a pilot vessel on duty uses only the standard anchor signals, or an anchor signal plus an identifying signal.