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What characteristic does the towing light share with another light?

  1. Color with the port sidelight

  2. Arc of horizon visibility with the sternlight

  3. Intensity with the masthead light

  4. Location with the starboard sidelight

The correct answer is: Arc of horizon visibility with the sternlight

The towing light shares the characteristic of an arc of horizon visibility with the sternlight. This refers to the angle at which the light is visible from a distance, and both the towing light and sternlight have a 135 degree arc of visibility. While the colors of the lights may vary, the intensity and location do not necessarily have to be the same as the other lights on a vessel.