🔍 Key Concepts

• Rule 35 – Sound signals in restricted visibility for vessels at anchor and vessels restricted in their ability to maneuver • Difference between fog signals for making way, underway but not making way, and at anchor • Special additional signals for vessels over 100 m and those restricted in ability to maneuver

💭 Think About

• First decide: in fog, what is the basic required sound signal for a vessel at anchor? Then, what changes (if anything) when that vessel is also restricted in her ability to maneuver? • Ask yourself: which choices here are whistle signals and which are bell/gong signals? Which group applies to vessels at anchor versus underway? • For a vessel over 100 meters at anchor, what extra equipment/signal (if any) must be used in addition to the standard anchor signal, and where on the vessel is it sounded?

✅ Before You Answer

• Verify in Rule 35(c)–(g) which specific subsection covers vessels at anchor and which covers vessels restricted in their ability to maneuver when underway • Check that the time interval (1 minute vs 2 minutes) matches the requirement for a vessel at anchor, not underway • Confirm whether a vessel at anchor and restricted in ability to maneuver changes from the standard anchor bell/gong pattern to a whistle pattern, or whether the restriction only affects signals when she is underway