🔍 Key Concepts

• Rule 30 – Anchored Vessels and Vessels Aground in the Navigation Rules • Different light and shape requirements for fishing, pilot, and vessels engaged in special operations • Exceptions to anchor lights for small vessels and vessels in or near narrow channels, fairways, or anchorages

💭 Think About

• Which rule specifically describes what lights an anchored vessel must show at night? Look for any listed exceptions in that same rule. • Do any of these vessel types have their own special light signals that might replace or add to the normal anchor lights? Think about fishing and pilot vessels especially. • Consider whether the question is asking about the type of work the vessel is doing, or the location/size of the vessel when deciding if anchor lights are required.

✅ Before You Answer

• Verify in Rule 30 which conditions allow an anchored vessel to not show anchor lights. • Check whether the exception is based on type of service (fishing, pilotage, survey) or on size/position (length, in a narrow channel, etc.). • Confirm that none of the options listed are simply vessels that must still comply with normal anchor light requirements, even while engaged in that service.