The light characteristic of flashing is used in the Aids to Navigation System on the Western Rivers for lights on __________.

Correct Answer: Option C — the right descending bank

Western Rivers buoyage regulations (33 CFR 62.51) dictate that lights on the right descending bank (RDB) exhibit a single flashing characteristic, showing red or white light. This distinguishes them from the group flashing (2) lights on the left descending bank.