What daymark shape is used in the lateral system?

Correct Answer: Option B — Triangle

In the U.S. lateral system, triangular daymarks are used to mark the starboard side of the channel when entering from seaward. These shapes, combined with red coloring and even numbering, provide clear visual guidance to mariners, as standardized in 33 CFR 62.25 and the U.S. Aids to Navigation System.