At 1200, your position is 2.0 miles southwest of Bartlett Reef Light. Your heading is 075°T. Visibility is less than 0.2 mile in fog and rain. Which of the following signals is most likely to be from another vessel?
• Sound signals in restricted visibility for power-driven vessels and vessels at anchor (Navigation Rules, Rule 35) • Difference between underway making way, underway not making way, and at anchor sound signals • What types of signals are given by a vessel at anchor vs. a vessel underway (whistle vs. bell vs. horn)
• Ask yourself: In dense fog near a reef light, are you more likely to be meeting a moving vessel or one that is anchored or aground near the hazard? • Think about which sound-producing devices (bell, whistle, horn) are typically associated with a vessel at anchor, and which with a vessel underway in restricted visibility. • Consider whether the relative bearing (e.g., 075° relative, 330° relative) affects the type of sound signal, or only the direction it comes from.
• Review Rule 35 for anchor signals (what instrument and pattern are used). • Verify which of the listed options (bell, whistle, horn) is the normal signal device for a vessel at anchor in fog. • Confirm that nothing in the question changes the basic Rule 35 requirements (e.g., your own heading or exact position do not alter what another vessel must sound).
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