High current areas present a real challenge to using
DP OCV’s in that these vessels propulsion and DP
systems are typically rated to operate in head on
currents of < 3 knots.
The vessel types best suited for installation of tidal
generators include 4 point moored vessels, or the lift
boat or self-elevating jack-up style work vessels. The
4 point moored barge or vessel could remain suitably
stationed in high currents. However, even these
vessels are limited to currents of approximately 5
knots. Lift boats or self-elevating jack-up vessels with
legs extending down to the seabed are the most
logical type vessel for use in high current areas