High-speed Sea Service

HSS 1500 Stena Explorer leaving Holyhead en route to Dún Laoghaire
HSS 1500 Stena Voyager leaving Stranraer en route to Belfast
HSS 1500 Stena Discovery leaving Hoek van Holland en route to Harwich
HSS 900 Stena Carisma in Gothenburg

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,[1] HSS Discovery near Willemstad, Curaçao[2] 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.[3]

HSS 1500

Main article: HSS 1500

Three larger vessels were purchased, each capable of transporting up to 1,520 passengers at a time:

Capacity 1520 passengers + 375 cars, or 120 cars + 50 freight units (900 lane metres)
Gross tonnage 19,638
Length 126.6 m (411.45 ft)
Beam 40.0 m (130 ft)
Height 27.5 m
Draught 4.8 m (15.6 ft)
Machinery 68 MW (91,000 hp) (twin COGAG configuration of 2 × GE LM2500 + 2 × GE LM1600 gas turbines), 4 × KaMeWa (now Rolls-Royce) type S waterjets for propulsion
Speed 40 knots (service speed), 51 knots (unladen record)
Hull Aluminium (the hull design is a Stena patent combining lightweight flexibility for maximum strength and efficiency).
Generator 3440 kW electrical generation (4 × Cummins KTA38G3(M)/KV12)[5]
Builder Finnyards, Rauma, Finland, cost £65m

HSS 900

Originally two HSS 900 vessels were ordered, the second one was scrapped - whilst being only partially (30%) complete - following bankruptcy of the shipyard. Leaving only one that entered service:

Capacity 900 passengers + 208 cars, or 151 cars + 10 coaches
Displacement 8,631 tonnes
Length 89.75 m
Beam 30.47 m
Draught 3.9 m draft
Machinery 33,500 kW (45,000 hp) (2 × ABBSTAL GT35) (Siemens SGT 500)

Fuel Heavy oil fuel IF-100

Speed 40 knots (service speed),
Generator 2,080 kW electrical generation (4 × MTU 12V 183 TE52)
Builder Westamarin, Norway

Routes

Until 2011, two identical 1500 passenger versions were in operation on routes across the Irish Sea, whilst a smaller, 900 passenger version operated a route across the Kattegat. In 2011, Stena Voyager was withdrawn from service on the Belfast-Stranraer route to be replaced by two chartered conventional ferries, MS Stena Superfast VII and MS Stena Superfast VIII. In 2015, Stena Explorer ceased to operate service between Dún Laoighaire and Holyhead.

Up until November 2008 and as of August 2014 Stena Explorer had been making two return trips to Dublin per day, at a faster advertised speed of 99 minutes. Up until 2006, this had been three return services per day.[7]

Withdrawal of Stena Discovery in 2007

HSS 1500 Stena Discovery sitting just in front of the Dry Dock at Harland and Wolff ship yard in Belfast, April 2007
HSS 1500 Stena Discovery sitting at a mooring at Harland and Wolff shipyard in Belfast, April 2007
HSS 1500 Stena Discovery moored in Belfast, April 2007

Stena Discovery was taken off the Hoek van HollandHarwich route on 8 January 2007, with her final in-service trip being the 10:40 ex-Harwich, returning to her home port of Hoek van Holland.

Taking a route via Dover and the Isle of Wight she arrived in Belfast, Northern Ireland on 24 January 2007 "to join her sisters on the Irish Sea", pending use as spare parts or possible sale. Any future use was still undecided, with Pim De Lange, Stena Line's director of North Sea operations quoted as stating that Stena Discovery has been returned to the care of Stena Ro Ro - the Swedish - based organisation's chartering arm - but that it is unlikely any other north - west European company would want to operate her.[8]

The HSS service was replaced with twice daily—one day, one night—sailings on a pair of traditional super ferries. The Stena Hollandica and Stena Britannica vessels now accept foot - passengers and were each stretched to 240 metres in length at the Lloyd Werft shipyard in Germany in the spring of 2007. In addition to passenger traffic, the HSS service is believed to have been carrying around 25,000 units of freight per year - about 15% of the 165,000 units that Stena Line transport across the North Sea annually.

The reasons cited for the replacement by conventional ferries were decreasing passenger patronage, coupled with escalating fuel costs.[9] A report in International Freighting Weekly following the withdrawal stated that Stena Discovery operation on the North Sea route was using more fuel than Stena's seven other conventional ferries on the North Sea put together. Fuel costs for the HSS were noted in the article to have risen 40% from 2004–2005 and again by another 15% in 2005 - 2006, something that was "unsustainable".[8]

In 2009, the Stena Discovery was sold to the new Venezuelan company Albamar (which does business as 'Ferrymar'). Renamed HSS Discovery, the ship was purchased to operate a route between the ports of La Guaira, Estado Vargas and El Guamache, Estado Nueva Esparta (Margarita Island). The operation was more economical as, with Venezuela being an oil-producing country, the original problem of fuel costs ceased to exist. Stena Discovery was managed by Stena Northern Marine Management, who dry docked her in April 2009 for maintenance before sale to the Venezuelan company.

On 29 September 2009 Stena Discovery finally left Belfast. Stopping off at Holyhead in North Wales to use the Stena Explorer's linkspan. This was to bring bunker fuel on board, she then finally left for South America on 1 October 2009.[10]

Timeline

Incidents

On 20 September 2001, Stena Explorer suffered a generator fire in one of her pontoons. Whilst reversing to dock at her berth in Holyhead, a fire was detected in her auxiliary (generator) engine room in the port pontoon. Shortly after, the CCTV system normally used for visual docking cut-off. Knowing that just-completed checks showed that fire doors (lasting at least one hour) were closed, permission to shut off the engine in question was (correctly) denied by the Master of the Ship until final approach line up with the Linkspan was confirmed. At this point the failing Cummins generator was shut-off.

In lieu of the CCTV system, docking distances were relayed to the bridge by portable radio. Berthing was complete within 5 minutes of the original fire alarm and fresh water was taken on board to replenish the Hi-fog fire suppression system whilst all 551 passengers were safely off-loaded. The fire brigade attended and the Hi-fog water mist was deactivated at their request. A nine-month Marine Accident Investigation Branch investigation found the fault to be incorrect fitting of a compression-fitting used for a high-pressure fuel line leading to fuel spraying and igniting upon contact with the hot turbo-charger unit.[20]

References

  1. http://www.marinetraffic.com/ais/details/ships/shipid:320398/mmsi:265430000/imo:9127760/vessel:STENA_CARISMA
  2. http://www.dutchcaribbeanlegalportal.com/news/latest-news/1840-criminal-investigation-into-disappearance-of-diesel-from-hss-discovery
  3. http://www.sjofartstidningen.se/stena-katamaran-till-atervinning
  4. "Press Release". General Electric Marine Engines. 2002-09-09.
  5. "K38-CP (Marine Generating Set) specification". Cummins Marine Group.
  6. "Belfast to Stranraer Ferry Timetable". Stena Line. 2011. Retrieved 2011-04-17.
  7. "Stena Line seeks 'essential' cost reductions in Dun Laoghaire". Dublin People. 2009-03-27. Retrieved 2009-03-30.
  8. 1 2 "Stena sacrifices speed for size". International Freight Weekly. 2007-01-12.
  9. "Fast-trips Ferry Axed". Sunday Mirror. 2007-01-07.
  10. "Nueva línea de ferrys comenzará a operar a partir de agosto". El Universal. 2009-06-15. Retrieved 2009-08-30.
  11. "ND 2002, 26 Average Adjuster no. 3050 (Stena Carisma)" (.doc).
  12. "A dream come true" (PDF). imput Magazine. May 2006.
  13. "Better fairways inaugurated by Minister of Infrastructure" (PDF). Re:Port. Port of Göteborg.
  14. "Last Keepers leave Baily". Beam Magazine (26).
  15. "Top Gear’s ferry daring stunt". Belfast Telegraph. 2009-10-06. Retrieved 2009-10-19. Top Gear were in Northern Ireland yesterday for their latest madcap stunt — firing a car at the Stena HSS in Belfast
  16. "Top Gear team in latest madcap stunt as they fire a family hatchback at a ferry". Daily Telegraph. 2009-10-09. Retrieved 2009-10-19. the Renault Twingo ... car was fired off the docks in Belfast at a departing Stena high-speed ferry
  17. "Ferry News". Harwich Haven Ships and Yachts.
  18. "HSS". uk.transport.ferry. 1998-08-28.
  19. "Lorry falls of back of ferry". Clacton Gazette. 2001-03-18. Retrieved 2009-02-03.
  20. "Report on the investigation of the fire on board HSS Stena Explorer entering Holyhead on 20 September 2001" (PDF). Marine Accident Investigation Branch. 2003.
  21. "Wave 'almost swept away' children". BBC News Online. 2007-02-20. Retrieved 2007-05-27.
  22. "Fire put out on Irish Sea ferry". BBC News Online. 2007-10-15. Retrieved 2007-10-16.
  23. "Lorry found hanging out of ferry". BBC News Online. 2009-01-29. Retrieved 2009-01-29. ... returned to Stranraer in Scotland after a lorry was discovered hanging out the back of the HSC Stena Voyager. The vessel was not long at sea when a loud bang was heard by passengers.
  24. "Report on the investigation of the shift of an articulated road tanker on board the roll-on roll-off high-speed sea service cargo ferry Stena Voyager in Loch Ryan on 28 January 2009" (PDF). Marine Accidents Investigation Branch. Retrieved 2009-10-06.

External links

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