46 CFR §30.10-20
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The term deadweight or DWT means the difference in metric tons between the lightweight displacement and the total displacement of a vessel measured in water of specific gravity 1.025 at the load waterline corresponding to the summer freeboard assigned according to 46 CFR, subchapter E.