🔍 Key Concepts

• Rule 15 – Crossing Situation (power-driven vessels crossing with risk of collision) • Relative position: which vessel is on the starboard side of the other • Responsibilities of the give-way vessel vs the stand-on vessel

💭 Think About

• From vessel A’s perspective, on which side (port or starboard) is vessel B located in the diagram as their tracks converge? • In a power-driven crossing situation, which vessel must keep out of the way: the one that has the other on her starboard side, or the one that has the other on her port side? • Based on which vessel must keep clear, what kind of avoiding action is normally expected (altering course to starboard, slowing, or passing astern)?

✅ Before You Answer

• Confirm that both A and B are power-driven vessels and that this is a true crossing (not head-on or overtaking). • Identify clearly which vessel is the give-way vessel and which is the stand-on vessel using Rule 15. • Check each answer choice against the correct responsibilities: the give-way vessel should avoid crossing ahead and usually alters to starboard; the stand-on vessel maintains course and speed within the limits of safety.