Question 33 RVR02 - Master of LT 500-1600 GRT

The Correct Answer is D **Explanation of Option D ("All of the above")** Option D is correct because all three scenarios listed (A, B, and C) are recognized under Rule 7 (Risk of Collision) of the International Regulations for Preventing Collisions at Sea (COLREGs), which apply both internationally and in most inland jurisdictions. * **Scenario C (The Primary Indicator):** Rule 7(a)(i) states that risk shall be deemed to exist if the compass bearing of an approaching vessel does **not** appreciably change. This is the fundamental definition of risk. * **Scenario A (The Exception):** Rule 7(a)(ii) notes that risk may exist **even when** an appreciable bearing change is evident, particularly when approaching a vessel at close range, or when dealing with very large vessels or tows. * **Scenario B (The Visual Indicator):** Observing both sidelights (red and green) of a vessel ahead for an extended period indicates a head-on or near head-on meeting situation (Rule 14). In such a situation, risk of collision is inherently high, especially if the observation confirms the vessel is not significantly changing course relative to you. Since A, B, and C all describe situations where risk of collision is present or deemed to exist, D is the comprehensive correct answer. *** **Brief Explanation of Individual Options (as stand-alone answers):** * **Option A is incorrect (as the single answer):** While A describes a valid scenario (the exception where risk exists even with an apparent bearing change, especially at close range), it is not the only condition under which risk exists, nor is it the primary indicator defined in the Rule. * **Option B is incorrect (as the single answer):** B describes a dangerous meeting situation, which certainly involves risk of collision, but it does not cover all circumstances (such as crossing situations or the fundamental lack of bearing change). * **Option C is incorrect (as the single answer):** C states the primary and most important indicator of risk (the constant bearing, decreasing range definition), but it is incomplete because it ignores the stated exceptions (Rule 7(a)(ii)) and other indicators of danger covered by the comprehensive answer D.