INTERNATIONAL ONLY On open water, a power-driven vessel coming up dead astern of another vessel and altering her course to starboard so as to pass on the starboard side of the vessel ahead would sound __________.

Correct Answer: Option D — one short blast

Under COLREG Rule 34(c)(i), a power-driven vessel operating in international waters and altering course to starboard to pass another vessel sounds one short blast to indicate her action.