NAB is approximately 1,000 acres (4 km2) in size and is composed of the Main Base, training beaches, California least tern preserve, recreational marina, enlisted family housing, and state park.

To the south of the Main Base, the majority of amphibious training activities takes place on about 257 acres (1.0 km2) of ocean beachfront property, leased from the State of California.

A least tern nesting preserve is located on North and South Delta Beach between the NAB Marina and Main Base.

These crews were deployed to the South Pacific area of operations, where their successful and historical efforts were contributory to the conclusion of World War II.

[5] Although landscaping and architectural modifications were to be made to obscure the shape,[5] 2023 imagery, the latest used by Google Earth, shows no substantive change.