🔍 Key Concepts

• Rule 30 – Anchored Vessels and Vessels Aground in the Navigation Rules • Different light requirements for vessels under 50 meters vs. 50 meters and over when at anchor • The meaning and use of all-round white anchor lights

💭 Think About

• First, think about what the Navigation Rules require for a power-driven vessel under 50 meters in length when it is at anchor in a harbor or anchorage, not underway. • Ask yourself: does a 25-meter vessel need one anchor light or two, and where would they normally be placed if two were required? • Consider whether red lights or normal deck lights are ever used as the primary required anchor signal under the Rules.

✅ Before You Answer

• Verify in Rule 30 what is required for an anchored vessel under 50 meters in length. • Check whether the second all-round white light (fore and aft) only applies to vessels of 50 meters or more. • Confirm that deck lights or a single all-round red are not listed as the standard anchor-light requirement for this size vessel.