BOTH INTERNATIONAL & INLAND You are operating in restricted visibility and hear a signal of a rapidly ringing bell followed by the rapid sounding of a gong. Which vessel is required to sound this signal?
• Rule 35 – Sound Signals in Restricted Visibility (Navigation Rules) • Difference between at anchor and aground sound signals • Special requirement for vessels 100 meters or more in length at anchor or aground
• First, decide: does this sound more like an at anchor signal or an aground signal? What extra bell pattern does an aground vessel use? • Look at the description: a rapidly ringing bell followed by a gong. Which rule says when a gong is required, and what is the minimum vessel length? • Compare the exact bell pattern in the rule (including any distinct strokes before/after) with the pattern described in the question. Which option’s status (anchor/aground) and length best match that pattern?
• Verify in Rule 35 which vessels must sound a bell, and which must sound both bell and gong. • Check the required bell pattern for a vessel aground (are there any extra strokes of the bell specified?). • Confirm the length threshold at which a vessel at anchor or aground must add the gong to the bell signal.
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