Question 36 ONC03 - Master LT 500-1600 GRT

The Correct Answer is A **Explanation for Option A (one short blast):** Under the Inland Navigation Rules (Rule 34(c)(ii)), when an overtaking power-driven vessel sounds the required signal indicating their intention to pass, and the vessel being overtaken agrees to the maneuver, the overtaken vessel must immediately sound the **same appropriate signal**. The overtaking vessel signaled their intention to pass you on your starboard side. This signal (the intent) is defined by one short blast. Therefore, your signal of agreement must also be **one short blast**. **(Note: This rule requires an exchange of signals. If you disagree, you must sound the danger signal (five or more short blasts) and then take steps to prevent collision.)** *** ### Why other options are incorrect: **B) one prolonged, one short, one prolonged, and one short blast in that order:** This signal (prolonged-short-prolonged-short) is the specific blast sequence required by International Rules (COLREGs Rule 35(a)) for a power-driven vessel underway but making way in restricted visibility. It is not used for signaling agreement to a passing maneuver. **C) two prolonged blasts:** Two prolonged blasts has no standard meaning for maneuvering or agreement in clear visibility. **D) two prolonged followed by two short blasts:** This is the required signal for certain vessels (like a vessel restricted in ability to maneuver, or sailing vessels) operating in or near restricted visibility (COLREGs Rule 35(c)). It is not used for signaling agreement to a passing maneuver in clear visibility.