🔍 Key Concepts

• Navigation Rules – Part C, Lights and Shapes (International & Inland) • Meaning of two all-round red lights in a vertical line versus red over white, and what extra white lights can indicate • Difference between lights for anchored, fishing, sailing, and pilot vessels

💭 Think About

• First, decide whether the red lights you see would be all‑round and in a vertical line, or side lights (port/starboard). How would that change the vessel type? • Think about which vessel types in the choices use special all‑round color combinations at the mast (e.g., red over white, green over white, white over red). Which choice does NOT match the pattern in the illustration? • Ask yourself: does an anchored vessel normally show red lights at all? If red lights are shown with white, what condition might that indicate under the Rules?

✅ Before You Answer

• Verify in the Navigation Rules what two all‑round red lights displayed together signify, and whether a white light is also required in that situation. • Check the standard light patterns for fishing vessels (including trawlers) and pilot vessels and compare their color order (top to bottom) to the illustration. • Make sure you distinguish between side lights (red/green at the bow) and all‑round lights at the mast; this changes which vessel type is correct.