What is the flashing sequence of a north cardinal buoy?

The correct answer for the flashing sequence of a north cardinal buoy is that it displays one short flash every second. This signaling pattern is vital for mariners as it helps them identify their location and navigate safely.

North cardinal buoys indicate that mariners should keep the buoy to the north when navigating. The continuous 1 short flash every second provides a consistent and easily recognizable signal at night, ensuring that it can be readily distinguished from other navigational aids, which may have different flash sequences. Understanding this pattern is crucial for safe navigation, as it aids in determining the safest passage through a waterway.

The other sequences do not correspond to the north cardinal buoy and represent different types of navigational aids which have distinct meanings and uses in maritime navigation.