A page from Lt. W. E. Bancroft's U.S. Navy flight logbook records his hours flying the PBM-5 Mariner flying boat between Naval Air Stations Alameda and San Diego during August 1952. Logbooks like this one provide a detailed, day-by-day record of a naval aviator's training and operational flying during the Korean War era, when PBM Mariners served in maritime patrol and search-and-rescue roles. Project: 218133