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What color is the sidelight on the left side of a boat?

  1. Red

  2. Green

  3. Blue

  4. White

The correct answer is: Red

The sidelight on the left side of a boat, also known as the port sidelight, is red. This is because in international maritime navigation rules, red lights indicate the left or port side of a vessel. Green lights, as seen on the right or starboard side of the boat, indicate the starboard sidelight. Blue and white lights are not used as sidelights on boats.