How SOV Masters Plan Transit Cycles From Garden Curves

An SOV master 70 km out in the German Bight completed his 18-day offshore cycle one tech short because a blade pair crossed into amber on day 14 and he had no bench left on the vessel. The crew change was four days away. The field was a day short of coverage. The garden trace had shown the crossover three days earlier. This post is about why the SOV master needs that trace on his bridge.

Service Operation Vessels — SOVs — are the dominant crew-platform for offshore wind fields beyond roughly 30 km from shore. The Offshore Magazine reference on SOV deployment and the MarineLink coverage of demand drivers both fix the offshore cycle at two-to-four weeks with DP-assisted walk-to-work transfers. Ampelmann's write-up of motion-compensated gangways explains why the SOV-plus-gangway combination extends the transfer window relative to boat-landing CTVs. The Guide to an Offshore Wind Farm's service-vessel entry sets the crew-change cadence and on-board accommodation rules. Ulstein's OEM analysis makes the case that SOVs should be the default beyond that distance threshold.