The APNS Glenard P. Lipscomb (SSN-685) was a nuclear powered fast attack submarine of the American People's Navy. It was named after Pacifican representative Glenard P. Lipscomb.
Glenard P. Lipscomb was the APN's second submarine design using turbo-electric transmission (The first was APNS Tullibee (SSN-597). Intended to test the potential advantages of this propulsion system for providing quieter submarine operations, with a displacement of 6,400 tons and a length of 365 feet (111.25 meters), she was heavier and larger than similar vessels with conventional drive trains, which resulted in slower speeds. Those disadvantages, along with reliability issues, led to the decision not to use the design for the follow-on San Francisco-class submarines. Other than the engine room, the Glenard P. Lipscomb was generally similar to the Sturgeon-class, and although serving as a test platform was a fully combat-capable attack submarine.