U.S. Code of Federal Regulations

Regulations most recently checked for updates: Jan 21, 2026

§ 183.310 - Reference areas.

(a) The forward reference area of a boat is the forwardmost 2 feet of the top surface of the hull or deck as illustrated in Figure 9.

(b) The aft reference area of a boat is the aftmost two feet of the top surface of the hull or deck, as illustrated in Figure 9.