In 2015, Stena Explorer ceased to function service between Dún Laoghaire and Holyhead. Two HSS 900 vessels had been KSS AUTOS originally ordered, however following bankruptcy of the shipyard the place they have been constructed, the second one was scrapped at only 30% full. This was to convey bunker fuel on board, she then finally left for South America on 1 October 2009.
In 2011, Stena Voyager was withdrawn from service on the Belfast-Stranraer route to get replaced by two chartered typical ferries, MS Stena Superfast VII and MS Stena Superfast VIII. Stena Explorer was the last of the vessels to be retired in 2015 when Stena Line cancelled the quick ferry service between Holyhead, Wales and Dún Laoghaire, Ireland. At Present, none of the four craft originally commissioned by Stena Line function. The operation was more economical as, with Venezuela being an oil-producing country, the original downside of fuel costs ceased to exist. Renamed HSS Discovery, the ship was purchased to function a route between the ports of La Guaira, Estado Vargas and El Guamache, Estado Nueva Esparta (Margarita Island). In 2009, the Stena Discovery was bought to the model new Venezuelan company Albamar (which does enterprise as ‘Ferrymar’).

High-speed Sea Service or Stena HSS was a category of high-speed craft developed by and originally operated by Stena Line on European worldwide ferry routes. Until 2011, two similar 1500 passenger versions were in operation on routes across the Irish Sea, while a smaller, 900 passenger version operated a route throughout the Kattegat. The latest of the craft was renamed HSS Discovery after being bought to a ferry company in Venezuela throughout 2009. The causes cited for the substitute by typical ferries have been decreasing passenger patronage, coupled with escalating fuel costs.
Stena Explorer, Stena Voyager and Stena Discovery were constructed to operate on the Irish Sea with Stena Carisma built for Scandinavian use. Several patents had been registered to Stena Line within the growth of the HSS, and four vessels have been accomplished between 1996 and 1997.