Peter S. Stewart served in the U.S. Navy as a Lieutenant Junior Grade with the Navy Patrol Squadron 42 during the Vietnam War. He died on December 14, 1967, when his SP-2H Neptune (#135594) disappeared during a storm in the Gulf of Alaska after departing Naval Station Kodiak en route from Anchorage, Alaska, to Fort Ord, Washington. The crash site was discovered in 1982, and crew remains were identified in 1983.