← All rulesTest yourself on this rule →
Part C — Lights & ShapesLights
28
Vessels constrained by their draught
In plain language
A vessel constrained by her draught may, in addition to the lights for a power-driven vessel, exhibit three all-round red lights in a vertical line, or a cylinder by day.
Full text of Rule 28
A vessel constrained by her draught may, in addition to the lights prescribed for power-driven vessels in Rule 23, exhibit where they can best be seen three all-round red lights in a vertical line, or a cylinder.
Reproduced from the COLREGs 1972 (as amended) for study. Always verify against the official IMO publication.
Key points
- 1
Three all-round red lights in a vertical line where best seen.
- 2
By day, a cylinder.
- 3
Only a power-driven vessel restricted by depth and width of navigable water may show it.
Opened — marked studiedNew