The Long Island
by Nelson McKeeby
USS Long Island occupies a foundational place in the development of the escort carrier concept during the Second World War, not because of combat achievements or technical sophistication, but because it demonstrated that a small, inexpensive carrier could perform essential naval aviation tasks effectively enough to justify mass production. Long Island was not designed as part of a coherent prewar doctrine; instead, it emerged from wartime necessity and experimentation, bridging the gap between fleet carriers and the operational demands of convoy warfare and dispersed global operations.
Originally laid down as the merchant vessel Mormacmail, Long Island was converted in 1940–1941 into an auxiliary aircraft carrier under the designation AVG-1, later reclassified as CVE-1. The conversion was deliberately modest. The ship displaced roughly a third of a fleet carrier, carried a small air group of about two dozen aircraft, and was capable of only modest speed. Its single flight deck lacked armor, its hangar facilities were limited, and its aircraft handling arrangements were simple by comparison with purpose-built carriers. Yet these apparent deficiencies proved irrelevant to the roles it was intended to fill. Long Island demonstrated that escort carriers did not need high speed, heavy protection, or large air groups to be operationally useful.
In early service, Long Island functioned primarily as an aircraft ferry and training platform, validating the idea that carrier aviation could be extended beyond the limited number of fleet carriers then available. More importantly, the ship provided a testbed for integrating air operations with convoy protection. Its aircraft could conduct anti-submarine patrols, provide limited air cover, and extend reconnaissance well beyond the visual horizon of surface escorts. These capabilities addressed a critical vulnerability in Allied maritime strategy: the “air gap” in the Atlantic, where land-based aircraft could not reach and where German U-boats operated with relative freedom.
Long Island’s operational employment made clear that even a small air group, operating continuously rather than episodically, could dramatically alter the balance in convoy defense. Aircraft did not need to sink submarines in large numbers to be effective; the mere presence of air patrols forced submarines to remain submerged, reduced their speed, limited their ability to attack, and disrupted coordinated wolfpack tactics. This realization was decisive. Escort carriers were not substitutes for fleet carriers, nor were they intended to project power ashore. They were instruments of control—controlling sea lanes, protecting logistics, and denying the enemy freedom of action.
The lessons learned from Long Island directly informed the rapid development of purpose-built escort carriers such as the Bogue and Casablanca classes. These ships retained the core characteristics proven viable by Long Island: low cost, rapid construction, merchant-derived hulls, and air groups tailored to anti-submarine warfare and convoy escort rather than strike operations. The United States Navy embraced the concept fully, producing escort carriers in numbers that dwarfed fleet carrier construction and integrating them into both Atlantic and Pacific operations.
Beyond anti-submarine warfare, the escort carrier concept expanded into roles including aircraft ferrying, pilot training, close air support for amphibious landings, and emergency replacement for damaged fleet carriers. While Long Island itself saw limited combat service and was eventually reassigned to training duties, its importance lay in proving that carrier aviation could be scaled downward without losing strategic relevance. It demonstrated that sea control did not require capital ships alone, but could be achieved through specialized vessels optimized for persistent, utilitarian tasks.
By the end of the war, escort carriers had become indispensable to Allied naval operations, operating in every theater and underpinning the logistical and operational reach of Allied forces. Long Island’s legacy was therefore conceptual rather than material. It validated a new category of naval aviation platform—one that emphasized availability, endurance, and integration over speed and striking power—and in doing so reshaped how naval airpower was applied across the world’s oceans during the Second World War.