In 2015, Stena Explorer ceased to function service between Dún Laoghaire and Holyhead. Two HSS 900 vessels were initially ordered, however following bankruptcy of the shipyard the place they were constructed, the second was scrapped at solely 30% full. This was to bring bunker fuel on board, she then lastly left for South America on 1 October 2009.

High-speed Sea Service or Stena HSS was a class of high-speed craft developed by and originally operated by Stena Line on European international ferry routes. Till 2011, two equivalent KSS AUTOS 1500 passenger versions had been in operation on routes throughout the Irish Sea, while a smaller, 900 passenger model operated a route across the Kattegat. The newest of the craft was renamed HSS Discovery after being sold to a ferry company in Venezuela during 2009. The reasons cited for the substitute by typical ferries had been lowering passenger patronage, coupled with escalating gasoline prices.
Stena Discovery was managed by Stena Northern Marine Management, who dry docked her in April 2009 for maintenance before sale to the Venezuelan company. Taking a route through Dover and the Isle of Wight she arrived in Belfast, Northern Eire on 24 January 2007, pending use as spare elements or attainable sale. In 2016 Stena Explorer was bought and exported to Turkey to be converted right into a floating workplace after spending a time period laid up in Holyhead. As of November 2019, one vessel is laid up (Stena Carisma in Gothenburg, Sweden, whereas in 2013 Stena Voyager (on the Belfast-Stranraer route between 1996 and 2011) was sent to Landskrona, Sweden to be scrapped.
In addition to passenger site visitors, the HSS service is believed to have been carrying round 25,000 units of freight per year – about 15% of the a hundred sixty five,000 models that Stena Line transport throughout the North Sea annually. The Stena Hollandica and Stena Britannica vessels now accept foot-passengers and have been each stretched to 240 metres in size at the Lloyd Werft shipyard in Germany in the spring of 2007. The HSS service was replaced with twice day by day – in the future, one night time – sailings on a pair of conventional super ferries. Up until November 2008 and as of August 2014, Stena Explorer had been making two return trips to Dublin per day, at a sooner marketed velocity of ninety nine minutes.