Typical example would be a station keeping or watch keeping of some kind at sea, an example would be- a satellite is being launched and that has to be monitored during the launch process and till it is in orbit, the signals that the satellite sends may not be possible to obtain in a particular land based station and we may require a sea station to obtain these things then, we require a stable platform and such platforms normally provided by swath vessels, which are fairly stable. Customs, offshore crew transportation.