Time domain helicopter borne electromagnetic system EQUATOR was developed in 2010. For past years it worked successfully on survey in various conditions. It proved its effectiveness for searching low contrast respectively small targets such as disseminated ore, kimberlites. EQUATOR’s main features are wide survey speed range and wide frequency band of receiver. First is due to construction properties. Speed variations do not affect survey results due to high precision transmitter-receiver positioning. Second advantage extends system abilities. Due to full time measurements EQUATOR provides also frequency-domain data processing. To get more informative frequency response several additional frequencies are induced. Added signal doesn't affect time-domain response because it is absent in operating impulse spectrum and can be removed in post processing. Due to small footprint EQUATOR is well suited for small sized targets exploration. Its’ measurements correspond well with ground EM and drilling data.