46 C.F.R. § 131.860
(a) The following must be plainly marked or painted, near one entrance of each rigid liferaft:
(c) The number of persons the rigid liferaft is approved for must be plainly marked or painted, over each entrance to each raft, in letters and numbers at least 102 millimeters (4 inches) high and in a color contrasting to that of the raft. This number must—