COLREGs · Rule 31
Seaplanes
Last verified: 2026-05-16
TL;DR
Seaplanes (and WIG craft) exhibit lights and shapes characteristic of vessels of their category as far as practicable.
Authoritative source
Source links checked against the current public rule corpus on 2026-05-16.
- 33 CFR §83.31— verbatim Inland Rule text (US Code of Federal Regulations)(retrieved 2026-05-16)
- International COLREGs Rule 31 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 31 — Seaplanes →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 31
Try the free Rules of the Road practice questions (no sign-in), or sign in to drill citation-backed questions on this rule with immediate feedback and the source chunk in a popover.