🔍 Key Concepts

• Risk of collision definition in the Navigation Rules (COLREGS) • What it means when the bearing of another vessel changes or stays steady • Difference between situations: crossing, overtaking, head‑on vs. the general test for risk of collision

💭 Think About

• Look at which option describes a general test that can apply in many situations, not just one specific type of encounter • Ask yourself: in practice on the bridge, what do mariners watch on the compass or radar to judge if they are on a collision course? • Consider which option mentions something you can observe and measure continuously as another vessel approaches

✅ Before You Answer

• Verify which option mentions the bearing of the other vessel rather than just relative direction (crossing, overtaking, head‑on) • Check Navigation Rules (Rule 7 – Risk of Collision) language about when risk of collision is deemed to exist • Confirm that the correct condition can apply in any meeting situation, not just crossing, overtaking, or head‑on individually