1950: Department of Interior Bourne Field was a US Marine Corps Air Facility (MCAF) located on St. Thomas, a part of the US Virgin Islands.

[4]: 10–12  Assigned to Bourne was the VO-9M observation squadron, a part of Aircraft One of the United States Fleet Marine Forces.

[5] On 30 October 1939 the US Navy awarded a contract for the development of San Juan, Puerto Rico, which initially included 44 individual projects.

[4]: 5  In July 1940, the contract was updated to include the expansion of Bourne and the military radio station and submarine base on St. Thomas.

[1] On 1 December 1941, the base was renamed MCAF (Marine Corps Air Facility) St. Thomas, Virgin Islands.

By the end of construction, Bourne hosted four barracks which provided living space for 740 personnel, and 74 housing units.

[3] On 11 June 1943 the 260-man strong Construction Battalion Maintenance Unit 507 arrived on the island to supplement the civilian contractors.

[3]: 406  The purpose of the squadron was to maintain an anti-submarine patrol between Puerto Rico and Martinique, however the diminishing activity of German U-boats made the base redundant.