Hearings Before the Merchant Marine and Fisheries, Subcommittee of the Committee on Commerce, United States Senate, Eighty-eighth Congress, First Session, on S. 627, a Bill to Promote State Commercial Fishery Research and Development, and for Other Purposes, S. 744, a Bill to Authorize the Secretary of the Interior to Construct Two Modern Stern-ramp Trawlers to be Used for Experimental, Commercial Fishing, Research, and for Other Purposes, S. 978 a Bill to Provide Medical Care for Certain Persons Engaged on Board a Vessel in the Care, Preservation, Or Navigation of Such Vessel, April 24 and 25, 1963