In the early years of the Second World War, and even prior to the USA itself joining this war, a huge demand for aircraft carriers stimulated a cost-effective alternative that could be delivered fast and in large numbers: the escort carrier converted from pre-selected hull structures of merchant vessels. This article focuses on the very first experiment of such a conversion: the USS Long Island. It describes the technical challenges of converting a merchant vessel into an escort carrier, the vessel's wartime exploits which illustrate the multi-purpose role of these type of vessels, and how she continued a rewarding civilian career soon after the war had ended.
This article presents an overview of a particular class of US Navy escort aircraft carriers, introduced around the time the USA joined World War 2. The Sangamon class consisted of 4 vessels, commissioned in 1942 and converted from fleet oilers that had been requisitioned by the US government in 1940-1941 from civilian oil transport companies. Their original design as an oil tanker provided a rather perfect fit for a quick conversion into an auxiliary aircraft carrier.
The Sangamon class was the only class of escort carriers converted from oil tankers. However, it provided a blueprint for a much larger number of newly constructed escort carriers in the course of WW2.