High-speed Sea Service

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. The HSS 1500 had an in-service speed of 40 knots (75 km/h).

Several patents were registered to Stena Line in the development of the HSS, and four vessels were ultimately completed during the late 1990s; Stena Explorer, Stena Voyager and Stena Discovery were built to operate around the British Isles with Stena Carisma built for Scandinavian use. The newest of the craft was renamed HSS Discovery after being sold to a ferry company in Venezuela during 2009.

Currently, none of the four craft originally commissioned by Stena Line operate. Stena Explorer was the last of the vessels to be retired, when in 2015 Stena Line ended the fast ferry service between Holyhead, Wales and Dún Laoghaire, Ireland. As of March 2015, three of the vessels are laid up (Stena Carisma in Gothenburg, Sweden,HSS Discovery near Willemstad, Curaçao and Stena Explorer in Holyhead, Wales) while in 2013 Stena Voyager (on the Belfast-Stranraer route between 1996 and 2011) was sent to Landskrona, Sweden to be scrapped.