U.S. Army
U.S. Army Quartermasters Dept.
U.S. Coast Guard
U.S. Department of Commerce
U.S. Lighthouse Service
U.S. Maritime Commission
U.S. Navy
U.S. Shipping Board
U.S. War Shipping Adm.
U.S.S.B
U.S.S.B.
U.S.S.R.
Union Oil Co.
Union Steamboat Line
Union Steamship Co.
Union Towing Co.
Union Transit, Ltd.
United Fuel & Supply Co.
United States Government
United States Steel Corp.
United States Transit Co.
United Towing & Salvage Co.
Upham & Weed
Upper Lakes & St. Lawrence Transportation Co.
Upper Lakes Shipping, Ltd.
USCAN, Inc.