A white light gives three quick flashes in a group, then darkness, as shown. Which cardinal mark is it?
A timeline of a white light at night, 20 seconds long. Three quick flashes in a group, then darkness, repeating every 10 seconds.
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East. Cardinal lights follow the clock face: 3 flashes at 3 o'clock for east, 6 and a long flash at 6 o'clock for south, 9 at 9 o'clock for west, and continuous quick flashing for north. The safe water is to the east of an east cardinal.
