Question 7 GLI02 - Mate of Unlimited Tonnage

The Correct Answer is C **Why option C is correct:** The scenario describes a narrow channel situation governed primarily by Rule 9 (Narrow Channels) and Rule 19 (Restricted Visibility) or Rule 15 (Crossing Situations), but crucially, it involves a situation where the operator is "in doubt as to his intentions" regarding another vessel, regardless of the specific rule applying to the interaction (crossing vessel). Rule 34(d) of the **International Regulations for Preventing Collisions at Sea (COLREGs)** states: "When vessels in sight of one another are in doubt as to whether sufficient action is being taken by the other vessel to avert collision, they may indicate such doubt by giving at least five short and rapid blasts on the whistle." This sound signal (the danger or doubt signal) is used internationally to communicate uncertainty or disagreement regarding the developing situation or the intentions of the other vessel, making option C the appropriate action for communicating doubt. **Why the other options are incorrect:** * **A) You must sound one prolonged and two short blasts:** This signal (Rule 35(b)) is used internationally by a **power-driven vessel underway but stopped and making no way through the water** in restricted visibility. It is not the signal used to communicate doubt between vessels in sight of one another. * **B) You should sound one short blast to indicate that you are holding course and speed:** Internationally, a single short blast indicates: "I intend to alter my course to starboard." Sound signals in COLREGs are generally reserved for expressing intended maneuvers (Rule 34(a)), not for merely affirming that you are holding course and speed. Furthermore, since you are in doubt, holding course and speed without signaling the danger would be inappropriate if a risk of collision exists. * **D) You are required to back down:** While maneuvering action is certainly required if a risk of collision exists (Rule 8), the question asks what signal or action is required *specifically* when you are **in doubt as to his intentions**. Backing down is a drastic physical maneuver, not the initial required communication action for expressing doubt. The immediate and specific requirement when in doubt is the sounding of the danger signal (five short blasts).