Accommodating up to 120 personnel and with a service speed in excess of 13 knots, Seven Seas is fitted with two work class ROVs, a Kongsberg Simrad SDP 22 dynamic positioning system and associated reference units together with specialised pipelay facilities. It also features a comprehensive array of survey and other positioning equipment.

Primary differential GPS surface positioning is provided by Veripos' Ultra service for worldwide accuracies of around 20cm. These are augmented by a GPS based Seatex Seapath 200 and MRU5 attitude determination system operating in real time at up to 100 times per second, while standard subsea positioning is via dual Kongsberg HiPAP ultra short baseline units.

Also fitted is a Kongsberg EM 1002 hull mounted multibeam echosounder for confirmation of seabed status affecting pipelay operations. All survey and positioning data are processed onboard by QPS QINSy workstations.