COLREGs · Rule 25
Sailing Vessels Underway and Vessels Under Oars
Last verified: 2026-05-16
TL;DR
Sidelights and sternlight; under 7 m may show only a torch in time to prevent collision. Optional red-over-green all-round at the masthead. A sailing vessel under sail and engine displays a forward cone apex-down.
Authoritative source
Source links checked against the current public rule corpus on 2026-05-16.
- 33 CFR §83.25— verbatim Inland Rule text (US Code of Federal Regulations)(retrieved 2026-05-16)
- International COLREGs Rule 25 verbatim text is published by the IMO. The Inland counterpart 33 CFR §83 chunk above mirrors the international wording almost verbatim.
Inland parallel
Inland Rule 25 — Sailing Vessels Underway and Vessels Under Oars →More from Part C — Lights and Shapes
Related drills
- Rule 20 — Application (Lights and Shapes)
- Rule 21 — Definitions (Lights)
- Rule 22 — Visibility of Lights
- Practise Rule 23 — Power-driven Vessel Underway
Drill COLREGs Rule 25
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