🔍 Key Concepts

• Rule 25 - Sailing Vessels Underway and Vessels Under Oars in the Navigation Rules • Meaning and placement of all-round red over green lights for sailing vessels • How combined lanterns (tri-color masthead lantern and/or combined side/stern lights) affect what other lights may be shown at the same time

💭 Think About

• Think about where the red over green all‑round lights are located and what other lights might be in the same physical location on the vessel. • Ask yourself: In which option would there be a conflict or duplication with another type‑approved navigation lantern arrangement? • Consider which options describe normal, permitted combinations of running lights for a sailing vessel, and which one would violate the specific provision in Rule 25.

✅ Before You Answer

• Verify what Rule 25 says about using combined lanterns on the mast and whether any other lights may be shown with them. • Check which arrangements involve lights being combined in one lantern versus simply being shown in their standard positions. • Confirm which configuration the Rule explicitly says shall not be exhibited in conjunction with the all‑round red over green lights.