Question 18 RVR03 - Mate of LT 500-1600 GRT

The Correct Answer is A **Explanation for A (One prolonged blast):** The sound signal of "One prolonged blast" is the standard signal used under both the International Regulations for Preventing Collisions at Sea (COLREGs, specifically Rule 34) and the U.S. Inland Rules for vessels maneuvering near bends or obstructions where other vessels may be hidden. This signal serves as a warning that a vessel is approaching a point of reduced visibility, alerting any potential traffic on the other side of the bend. **Why the other options are incorrect:** * **B) Two short blasts:** This is a maneuvering signal indicating a vessel is taking action (e.g., passing a vessel, or changing course/speed) and specifically means "I intend to alter my course to starboard." It is not the designated signal for warning vessels around a blind bend. * **C) One short blast:** This is a maneuvering signal indicating a vessel's intended action, specifically meaning "I intend to alter my course to port" (under International Rules when overtaking) or simply "I am going to change my course to starboard" (under Inland Rules in certain contexts). It is not the designated warning signal for a blind bend. * **D) One long blast:** While the term "prolonged blast" often implies a long duration, the precise regulatory term is "prolonged blast" (lasting 4 to 6 seconds). The term "long blast" is not the defined maneuvering signal used in Rule 34 for a bend; therefore, A is the most accurate and precise regulatory answer.