Question 36 GLI01 - Master-Unlimited Tonnage

The Correct Answer is A. **Explanation for Option A (Correct Answer):** According to the U.S. Inland Navigational Rules (specifically Rule 34(c) regarding maneuvering and warning signals), when an overtaking vessel sounds the required signal indicating the intention to pass on the starboard side (which is one short blast), the vessel being overtaken must respond to acknowledge agreement. The prescribed answering signal of agreement is **one short blast**. This signal confirms that the vessel being overtaken understands the intention and agrees to the maneuver. **Explanation of Incorrect Options:** * **B) one prolonged, one short, one prolonged, and one short blast in that order:** This sequence is the signal prescribed for a vessel restricted in visibility making her way but is also used in Inland waters as the danger or warning signal (five or more short blasts, preceded by this sequence) or the "bend" signal, but it is not the signal for agreeing to an overtaking maneuver. * **C) two prolonged blasts:** A prolonged blast (about 4 to 6 seconds) is the signal for a vessel leaving a dock or berth. Two prolonged blasts are not used as the signal for agreeing to an overtaking maneuver. * **D) two prolonged followed by two short blasts:** This sequence is the general maneuvering signal used in the International Rules (COLREGs) to indicate "I intend to leave you on my port side" (or a different interpretation depending on the context), but under U.S. Inland Rules, this specific signal is not used for agreeing to an overtaking maneuver. (In Inland Rules, the intended passing signal for port-to-port is two short blasts, and the agreement is also two short blasts.)