LCAS’ fully certified (Supplemental Type Certificate) gravity meter interface is designed to give aircraft the ability to carry a Micro’g LaCoste- based airborne gravity system in the cabin area. The “TAGS” Turnkey Airborne Gravity System installation is completed using LCAS interface plates to secure the gravimeter to the aircraft by attaching the interface plate assembly to the seat rails and providing restraint systems. The modification can include supporting systems installations consisting of (but not limited to) of GPS antennas, AG-NAV display and radar altimeter system coupled to the data acquisition in the TAGS gravity meter.