🔍 Key Concepts
• Rule 15 – Crossing Situation (International Rules): Decide which vessel is the stand-on vessel and which is the give-way vessel from the diagram.
• Rule 34 – Maneuvering and Warning Signals (International): Understand what one short blast means internationally and whether it is an "intention" signal needing agreement or simply a declaration of your own maneuver.
• Difference between International and Inland whistle signals in crossing situations, especially the need (or not) for an answering signal from the other vessel.
đź’ Think About
• From the illustration, determine which vessel has the other on her starboard side, and therefore which is required to keep out of the way.
• Ask yourself: Under the International Rules, when one vessel sounds one short blast in a crossing situation, is the other vessel required to repeat that signal, to sound a different maneuvering signal, or to remain silent unless it changes course or has doubt?
• Consider what the stand-on vessel is supposed to do with her course, speed, and sound signals when the give-way vessel takes proper avoiding action that is clear and early.
âś… Before You Answer
• Verify under Rule 34 (International) whether there is any requirement for an "agreement" or "answer" signal, as there is under Inland Rules.
• Check whether vessel "B" is actually altering course at all in the scenario; if she maintains course and speed as stand-on, ask if she needs to sound a maneuvering signal.
• Confirm that each multiple-choice option matches a specific, defined signal in the International Rules; if none fits what B is actually required to do, consider "none of the above."