Geotech Ltd. is a world leader in Airborne Geophysics offering services in Airborne Gravity, Magnetics, Gradient Magnetometer, Radiometrics, VTEM (time domain electromagnetic) and our latest advancement, ZTEM (Airborne Magneto-tipper). Geotech Ltd. is based in Aurora, Ontario, Canada with sister offices in Russia, Australia, Ghana, South Africa, Barbados and Brazil.