Inland · Rule 30
Anchored Vessels and Vessels Aground
TL;DR
At anchor: forward all-round white (and a second all-round aft if 50 m+), or one ball by day. Aground: same as anchored plus two all-round red, or three balls by day.
Why it shows up on the exam
Vessels under 7 m at anchor not in or near a narrow channel may omit the anchor light or shape.
Authoritative source
International parallel
COLREGs Rule 30 — Anchored Vessels and Vessels Aground →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 Inland Rule 30
Sign in to drill citation-backed questions on this rule with immediate feedback and the source chunk in a popover.