Trio of Red Hulled Survey & Rescue Ships Call to Dun Laoghaire Harbour in Short Succession 27th April 2021 Of the trio of red-hulled survey and rescue ships that called to Dun Laoghaire within weeks, was Vos Endurance, an Emergency Response & Rescue Vessel (ERRV) berthed at St. Michaels Pier. Astern of the ship the fishing trawler Magan D as Afloat reported last month.. Three red hulled vessels since last month have called to Dun Laoghaire Harbour, where two of these ships required the same reasons, to enable a crew change, writes Jehan Ashmore. Of the callers, the most recent was Arctic Ocean, a Survey and Standby Safety Vessel (SSV) that last week had arrived from Oostende, Belgium.