🔍 Key Concepts

• Rule 30 – Anchored Vessels and Vessels Aground in the Navigation Rules • The special size/length exemptions for anchor lights at night • Difference between a vessel’s type or status (e.g., power-driven, dredging, restricted in ability to maneuver, pilotage) and whether it must still comply with anchor light rules

💭 Think About

• First, recall what Rule 30 generally requires an anchored vessel to show at night. Then think about which vessels are given explicit exemptions based on their size or location. • For each choice, ask: if this vessel is at anchor and not making way, do its special working lights or status replace anchor lights, or must it still comply with the basic anchor light requirements? • Consider whether the exemption, if any, is based on what the vessel is doing (pilotage, dredging, restricted maneuverability) or on some other factor such as length or where it is anchored (e.g., in a narrow channel, near a channel, or outside).

✅ Before You Answer

• Verify in Rule 30 which anchored vessels are exempted from showing anchor lights and why. • Check whether working-status lights (such as for dredging or restricted in ability to maneuver) ever cancel the requirement for anchor lights, or are shown in addition to them when at anchor. • Confirm if the rule singles out any specific vessel lengths or locations (e.g., under 7 meters, in a special area) that do not need to display anchor lights.