Section II. Conduct of vessels in sight of one another.
Rules in this section shall apply to vessels in sight of one another.
(i) when each has the wind on a different side, the vessel which has the wind on the port side shall keep out of the way of the other;
(iii) if a vessel with the wind on the port side sees a vessel to windward and cannot determine with certainty whether the other vessel has the wind on her port or starboard side, she shall keep out of the way of the other.
(b) For the purposes of this rule the windward side shall be deemed to be the side opposite to that on which the mainsail is carried or, in the case of a square-rigged vessel, the side opposite to that on which the largest fore-and-aft sail is carried.
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