Report on the review of certain contracts by Federal Maritime Board, Department of Commerce, for construction-differential subsidy and related ship construction. Letter from the Comptroller General of the United States transmitting a report on the review of three contracts entered into by the Federal Maritime Board for construction-differential subsidies on 13 ships, and five ship-building contracts for the construction of these vessels under the subsidy and other provisions of the Merchant Marine Act, 1936 (49 Stat. 1985; 46 U.S.C. 1101).