Question 57

The Correct Answer is D. **Why Option D ("Display the code letter "Y" (Yankee)") is correct:** According to the established international conventions and recommended practices for vessels operating in ice and being assisted by an icebreaker, the assisted vessel indicates its readiness to cast off the towline (or readiness for the icebreaker to proceed clear) by displaying the International Code Flag "Y" (Yankee). The meaning of the Yankee flag in this context is "I am ready to cast off the towline." **Why the other options are incorrect:** * **A) Sound five short blasts of his whistle:** Five or more short blasts are the international signal for doubt or danger, meaning "I am not sure of your intention, and/or I doubt whether you are taking sufficient action to avoid a collision." It is not the signal for casting off a towline. * **B) Display code numeral "5":** Displaying a single code numeral flag generally conveys tactical maneuvering information or part of a more complex message, but it does not specifically signify "ready to cast off towline" in standard maritime procedures. * **C) Sound one prolonged blast of the whistle:** A single prolonged blast is typically used as a warning signal or, when underway, to indicate a vessel's presence when approaching a blind bend or exiting a berth/slip. It is not the designated signal for casting off a towline during ice operations.