An aircraft has indicated that he wants you to change course and follow him. You cannot comply because of an emergency on board. Which signal should you make?
• Distress vs. maneuvering signals: which signals mean you are in grave and imminent danger versus unable to comply with orders • Morse code single-letter meanings in the International Code of Signals (ICS) and their use by flashing light • How aircraft direct vessels and how ships respond when they cannot follow instructions
• Look at which option clearly indicates an emergency situation on your vessel, not just a change in course • Ask yourself: which choice is a recognized international signal that tells others you are unable to comply with their directions? • Consider whether any option would be dangerous or confusing as a response to an aircraft trying to direct you
• Verify which signal is specifically associated with distress or emergency on board in the International Code of Signals or COLREGS Annex IV • Check if any answer describes a standardized Morse single-letter signal used to mean "unable to comply" or similar • Eliminate choices that are merely maneuvering actions (turns) without a clear, recognized communication meaning
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