Towing & Ship-Assist · Towing Lights
When the length of the tow astern exceeds 200 meters, the towing vessel displays:
- AOne masthead light only
- BTwo masthead lights and no towing light
- CThree masthead lights in a vertical line✓ Correct
- DA flashing blue light
Explanation
If the tow exceeds 200 meters, the towing vessel shows three masthead lights in a vertical line instead of two, alerting others to the exceptional length of the tow astern.
Authority: Navigation Rules, Rule 24(a)(i)
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