all of that Swift operating dis- was had by- packing put CIO * S.F. Navy Blast Kills SAN FRANCISCO, Jan. 28.--(IP) --Two men were dead today third missing as the result of explosion of a navy yard tug San Francisco bay, the 12th naval district reported. The explosion, which occurred at 8:35 a. m. yesterday, but not reported by the navy until today, sank the tug, Tamaroa, in 'eet of water 400 yards off Hunters Point. The dead were identified as Seaman First Class Paul Joseph grovanni, son of Mrs. Concita grovanni, 1807 Sheridan street, Mich., and Fireman First Dlass Lawrence Raymond Parks, lusband of Mrs. Jane Parks, Pershing avenue, Granite City, 111. The missing sailor was not identified, pending notification of of kin. Bongrovanni's body was recovered by divers from the crew's quarters of the tug. Navy Officers said the Tarnaroa had towed the USS Jupiter repair berth. As it cast off line, the ship's propeller apparently pierced the hull and boiler the tug, causing the boiler to explode.