Rules of the Road · Day Shapes — Towing

When the length of a tow exceeds 200 meters, the towing vessel and the vessel being towed each display:

Explanation

When the tow exceeds 200 m measured from the stern of the tug to the after end of the tow, a diamond shape is shown where best seen on both the towing and towed vessels.

Authority: COLREGS/Navigation Rules, Rule 24(e)

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