LCAS’ fully certified (Supplementary Type Certificate) GT-1A & GT-2A Gravity Meter System is designed to give AS350 Helicopter the ability to carry Canadian Micro Gravity Meter GT-1A or GT-2A in the cabin area. This installation is completed using GT-1A & GT-2A Gravity Meter System to secure the gravimeter to the Helicopter by attaching the Gravity Meter System to the seat rails and providing a safety cage with restraint systems. The modification can include supporting systems installations consisting of (but not limited to) Radar Altimeter Model ALA-52B & Sensor Systems Antennas, GPS Antennas, temperature Humidity Probes and Flight Display Systems.