the F-20 Tigershark. In mid/late 1995, the U.S. Marine Corps conducted a trial of the GPU-5 on the LCAC-66, as a potential weapon to provide suppressive fire for landing forces. The pod was mounted on a standard MAU-12 bomb rack, itself mounted in a standard cargo container. It was believed that four such containers could then be carried on the LCAC. The resulting combination was referenced as the Gun Platform Air Cushion (GPAC). By 1997, the Marines had reportedly acquired the USAF's entire stock of GAU-13/A cannons and GPU-5 pods as surplus. Besides the GPAC, the GAU-13/A was also touted as possible armament on ships and ground vehicles such as the LAV-25. Citations General and cited sources f-16.net Friedman, Norman (1997). The Naval Institute Guide to World Naval Weapon Systems. Naval Institute Press. . Polmar, Norman (2004). The Naval Institute Guide to the Ships and Aircraft of the U.S. Fleet. Naval Institute Press. . 30 mm artillery Aircraft guns Military equipment introduced in the 1970s Rotary cannon