Kongsberg Maritime has completed the mid-life refit of the hydrographic survey equipment onboard the (Oceanographic Research Vessel) ‘B.I.O Hesperides’. The vessel, originally commissioned in 1991 and based in the Antarctic seas for 6 months a year, was one of the first large survey equipment installations for KONGSBERG. Likewise, this is the first full mid-life refit of survey equipment carried out by the company. The survey package supplied and installed by Kongsberg Maritime was based on the EM120 1°x2° multibeam echosounder. The EM120 is a tried and tested multibeam sounder for deep water mapping with the 12 kHz operating frequency being the optimum choice in order to achieve efficient mapping of larger ocean areas.