Title 46 › Subtitle Subtitle II— Vessels and Seamen › Part E— Merchant Seamen Licenses, Certificates, and Documents › Chapter 73— MERCHANT MARINERS’ DOCUMENTS › § 7312
Lets different kinds of able seamen count toward the number of able seamen a vessel must carry, but sets limits based on the seaman’s certificate, the ship’s size, and where it works. Able seamen—unlimited: can make up all required able seamen on any vessel. Able seamen—limited: can make up all required able seamen on vessels under 1,600 gross tons (or an alternate tonnage set by the Secretary) and on vessels operating on the Great Lakes and the Saint Lawrence River as far east as Sept Iles; on other vessels they can be at most 50 percent. Able seamen—special: can make up all required able seamen on vessels of 500 gross tons or less (or alternate tonnage), seagoing barges, or towing vessels; otherwise they can be at most 50 percent. Able seamen—offshore supply vessel: can make up all required able seamen on vessels under 500 gross tons (or 6,000 gross tons under the alternate measure) used to support offshore resource work; limited able seamen may make up all such positions on certain larger offshore support vessels as described. When limited and special certificates are used together, they cannot exceed 50 percent of the required total. Able seamen—fishing industry: can make up all required able seamen on certain fish processing vessels specified by date in service and size (dates: before Jan 1, 1988; after Dec 31, 1987; sizes up to 5,000 gross tons; and, for post‑1987 vessels, those with more than 16 people preparing fish).
Full Legal Text
Shipping — Source: USLM XML via OLRC
Legislative History
Reference
Citation
46 U.S.C. § 7312
Title 46 — Shipping
Last Updated
Apr 5, 2026
Release point: 119-73not60