🔍 Key Concepts

• Rule 18 – Responsibilities Between Vessels (hierarchy: NUC, RAM, CBD, fishing, sailing, power-driven, seaplane) • Definition of a vessel engaged in fishing vs an ordinary power‑driven vessel (see Navigation Rules, Rule 3) • How a sailing vessel fits into the priority list when meeting a vessel trawling

💭 Think About

• First decide: when a power-driven vessel is trawling, is she treated just as a power-driven vessel, or as a vessel engaged in fishing under the Rules? • Next, compare the relative obligations between a sailing vessel and a vessel engaged in fishing in Rule 18 – which one is required to keep out of the way? • Ask yourself whether the relative position (on starboard or port side) changes anything once one vessel has higher priority under Rule 18.

✅ Before You Answer

• Verify the exact wording in Rule 3(d) – vessel engaged in fishing (does it include trawling?) • Check Rule 18(a) and (b) to see which types of vessels must keep clear of which others, especially ‘sailing vessel’ and ‘vessel engaged in fishing’. • Confirm whether any crossing‑situation rule (Rule 15) overrides the special hierarchy in Rule 18, or whether the hierarchy takes precedence.