🔍 Key Concepts

• Rule 35 – Sound signals in restricted visibility for vessels at anchor • Difference between vessels underway and at anchor in fog signals • Length threshold where extra signals (like a gong) are required

💭 Think About

• First decide: Is a vessel at anchor treated the same as a vessel underway for fog signals, or is there a separate requirement? • Look up in Rule 35 the specific subsection that applies to a vessel at anchor less than 100 meters in length and note the exact time wording used there. • Compare that time requirement with the standard time interval used for power-driven vessels underway making way.

✅ Before You Answer

• Confirm in Rule 35 which subsection covers vessels at anchor (not underway) in or near an area of restricted visibility. • Check the length condition: what changes when the vessel is 100 meters or more vs. under 100 meters? • Read the exact phrase about time: "at intervals of not more than ___" and match that to the closest multiple-choice option.