BOTH INTERNATIONAL & INLAND A 15-meter sailing vessel would be required to show __________.

Correct Answer: Option A — sidelights, and stern light, but they may be in a combined lantern on the mast

Under Inland Navigation Rules, for the condition where 'A 15-meter sailing vessel would be required to show', the correct requirement is: 'sidelights, and stern light, but they may be in a combined lantern on the mast'. This standard ensures clear navigational intent and collision avoidance.