High-speed Sea Service
（重定向自High Speed Ship）
![HSS 1500 Stena Explorer leaving Holyhead en route to Dún Laoghaire](/Images/godic/202501/18/Stena_Explorer_leaving_Holyhead2402.jpg")
![HSS 1500 Stena Voyager leaving Stranraer en route to Belfast](/Images/godic/202501/18/Stenavoyager2402.JPG")
![HSS 1500 Stena Discovery leaving Hoek van Holland en route to Harwich](/Images/godic/202501/18/Hoek_van_holland_stena_line2402.jpg")
![HSS 900 Stena Carisma in Gothenburg](/Images/godic/202501/18/Stena_Carisma2402.JPG")
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.