š Key Concepts
ā¢ Rule 35 ā Sound Signals in Restricted Visibility (fog signals)
ā¢ Different sound signals for power-driven vessels, vessels being towed, and vessels not under command / restricted in ability to maneuver
ā¢ How many short blasts are added to one prolonged blast for different special conditions
š Think About
ā¢ Look at each choice and recall if that vessel type has a specific fog signal in Rule 35, and whether it uses short blasts added to a prolonged blast.
ā¢ Ask yourself: for a vessel being towed, is there a different signal than the towing vessel, and how many short blasts are used?
ā¢ Compare the signal in the question (one prolonged and three short) with the ones you remember for: not under command, restricted in ability to maneuver, constrained by draft, fishing, or sailing.
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Before You Answer
ā¢ Verify in Rule 35 exactly which vessel uses one prolonged and three short blasts in fog.
ā¢ Check whether distress has its own separate, more general sound/visual signals, rather than this specific pattern.
ā¢ Confirm which vessel(s) sound this signal: the towing vessel or the towed vessel(s), and under what condition (e.g., last vessel of the tow if manned).