46 C.F.R. § 160.050-2 – Types and sizes.

(a) Type. Life buoys shall be of the annular ring type as described in this subpart, but alternate arrangements meeting the performance requirements set forth will be given special consideration.
(b) Sizes. Ring life buoys shall be of the sizes set forth in Table 160.050-2(b). A tolerance of a plus or minus 5 percent will be allowable on the dimensions indicated in Table 160.050-2(b).
Table 160.050-2(b)—Sizes and Dimensions of Ring Life Buoys
Size Dimensions (inches) Finished ring
30-inch 30
24-inch 24
20-inch 20

Table 160.050-2(b)—Sizes and Dimensions of Ring Life Buoys
Size	Dimensions (inches) Finished ring
30-inch	30
24-inch	24
20-inch	20

[CGFR 54-46, 19 FR 8707, Dec. 18, 1954, as amended by CGFR 62-17, 27 FR 9045, Sept. 11, 1962]