USCGC Winnebago (WHEC-40) was an Owasco-class high endurance cutter built by Western Pipe & Steel at their San Pedro shipyard. Commissioned on 21 June 1945, just weeks before the end of World War II, she was initially designated WPG-40 and later reclassified as WHEC-40, with "HEC" denoting "High Endurance Cutter." Named after Lake Winnebago in Wisconsin, she served the United States Coast Guard for nearly three decades until her decommissioning in 1973. Throughout her service, Winnebago was based in multiple locations, starting in Miami, Florida, where she conducted law enforcement, ocean station, and search and rescue operations. She later moved to Boston, Massachusetts, and then to Honolulu, Hawaii, where she served from 1949 to 1972. During her time in Hawaii, she participated in ocean station duties, providing weather observations, navigation, and communication support for aircraft and ships, particularly at Ocean Station Victor, located roughly halfway between Midway Island and Japan. Typical patrols lasted 72 days, with the cutter traveling to and from the station via a seven-day transit from Honolulu. Notable incidents include running aground on Tripod Reef in 1962, from which she was extricated by Navy tugs. She also conducted rescue and aid missions, such as assisting the disabled merchant vessel MV Green Mountain State in 1963, and rescuing shipwrecked crew members from the South Pacific in 1964. Winnebago's medical team performed several significant medical evacuations, including appendectomies and a foot amputation, during her operations. In 1968-1969, Winnebago served with Coast Guard Squadron Three during the Vietnam War as part of Operation Market Time. Her combat operations involved destroying enemy bunkers, observation towers, and tunneling complexes, as well as investigating over 1,500 vessels for enemy infiltration. Her crew also participated in multiple search-and-rescue missions, saving personnel from sinking ships. Decommissioned in 1973 and sold for scrap in 1974, Winnebago's service exemplified the multi-mission role of the Coast Guard's high endurance cutters, contributing significantly to maritime law enforcement, rescue, and military efforts during her operational lifetime.

This description has been generated using GPT-4.1-NANO based on the Vessel's wikidata information and then modified by ShipIndex.org staff.