The EM series were manufactured by Kongsberg, now Kongsberg Maritime, located in Kongsberg, Norway.

The Kongsberg Simrad series are shallow- and deep-water multibeam sensor systems.

The Simrad EM100 is a 95 kHz multibeam echosounder capable of mapping the seafloor at depths between 5 and 600 metres below the transducer.

The Simrad EM1000 is a 95 kHz multibeam echosounder capable of mapping the seafloor at depths between 3 and 1000 metres below the transducer.

The Simrad EM3000 is a 300 kHz multibeam echosounder capable of mapping the seafloor at depths between 3 and 70 metres below the transducer.

GeoDAS-PC supports passive acquisition of data from EM12/950/1000/3000 systems. OIC also supports post-acquisition processing of EM300, 1000 and EM12 data with the OICToolkit.

In addition, OIC supports post-acquisition of all the above-listed Kongsberg Simrad products with OICcleansweep.