What is the minimum height of rails on passenger decks of ferryboats, excursion vessels, and vessels of a similar type? (small passenger vessel regulations)

Correct Answer: Option C — 39-1/2 inches (1 m) high

46 CFR 177.900 mandates that rails on passenger decks of small passenger vessels must be at least 39.5 inches (1 meter) high. This standard is designed to prevent accidental falls overboard, providing a necessary safety barrier for passengers on excursion vessels and ferries operating in various maritime environments.