How many people died in the event that is memorialized at  The Port Chicago Naval Magazine National Memorial?
Port Chicago Naval Magazine National Memorial The Port Chicago Naval Magazine National Memorial is a memorial dedicated in 1994 recognizing the dead of the Port Chicago disaster, and the critical role played by Port Chicago, California during World War II, in serving as the main facility for the Pacific Theater of Operations. The memorial is located at the Concord Naval Weapons Station near Concord, California, in the United States.
SS Emidio SS "Emidio" was a 6912-ton tanker of the General Petroleum Corporation (later Mobil Oil), which became the first casualty of the Imperial Japanese Navy's submarine force action on California's Pacific Coast. It was one of four attacks on shipping, the others being "Samoa, Larry Doheny," and "Montebello", all attacked off the coast of California before Christmas. "Emidio" was sailing in ballast from Seattle, Washington en route to San Pedro, California. The Japanese submarine I-17 found "Emidio" off Cape Mendocino on the early afternoon of 20 December 1941, immediately attacking with its 14-cm deck gun. Realizing that the situation was futile, Captain Farrow raised a white flag and gave the order to abandon ship. Ignoring the surrender, the I-17 continued firing from its deck gun, blasting three crew members who were lowering a lifeboat overboard. Four crew members remained on board: a radio operator and three engineers. When the I-17 fired a torpedo, it struck the engine room and killed two of the engineers and injured the third. In total the I-17 hit the tanker with five shells from its 14-cm deck gun and one torpedo killing five crew members. A Catalina flying boat of 44 Patrol Squadron attacked I-17 with depth charges, but the submarine dove and escaped. The Coast Guard Cutter "Shawnee" rescued the remaining 31 survivors who had rowed 16 hours to Humboldt Bay. The abandoned tanker drifted north and broke up on the rocks off Crescent City. The bow drifted into the harbor, where it lay until scrapped in 1959. The remains of the hull are still in the harbor, near a commemorative plaque. The site has been declared a California Historical Landmark #497.