BOTH INTERNATIONAL & INLAND Which is a characteristic of a "flashing light"?

Correct Answer: Option C — flashes at regular intervals at a frequency of 120 flashes or more per minute

Rule 21(j) defines a flashing light as one flashing at regular intervals at a frequency of 120 flashes or more per minute. This high-frequency characteristic is used for specific signals, such as those on air-cushion vessels or for special identification, distinguishing them from other navigational lights used at sea.