Heavy Attack Squadron 21 (VAH-21) Naval Air Test Center Project TRIM

Established as Heavy Attack Squadron TWENTY ONE (VAH-21) on 1 Sep 1968. Disestablished on 16 Jun 1969.

PROJECT TRIM: Trails Roads Interdiction Multi-sensor, was designed to use then new technologies such as FLIR (Forward Looking Infra-Red) and LLLTV (Low Light Level Tele-Vision) to track and attack North Vietnamese supplies and troops along the Ho Chi Minh Trail. Along with the sensors the aircraft were given heavy armament, with the installation of two 20mm cannon in the tail, a series of grenade launchers in the belly, two forward firing minigun pods, a minimum of two 500 lb bombs, and two 7.62mm waist guns.

Lockheed AP-2H Neptune