On entering from seaward, a starboard side daymark will __________.

Correct Answer: Option A — have an even number if numbered

Under the IALA-B system used in US waters, lateral aids are numbered sequentially from seaward. Starboard-hand marks (entering from seaward) are assigned even numbers, while port-hand marks are assigned odd numbers. This standardized numbering system assists mariners in maintaining orientation within a channel during transit.