28
Vessels Constrained by Their Draught
A vessel constrained by draught may display three all-round red lights in a vertical line, or a cylinder day shape.
Rule 28 allows a vessel constrained by her draught to additionally exhibit three all-round red lights in a vertical line, or a cylinder as a day shape, in addition to the lights prescribed for power-driven vessels in Rule 23.
Key Takeaways
1
Three red all-round lights in a vertical line
2
Day shape is a cylinder
3
These are IN ADDITION to normal power-driven vessel lights
4
This is optional — the vessel MAY display these signals
Common Mistakes
Confusing constrained-by-draught lights with NUC or RAM lights
Not recognizing the cylinder day shape
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