The core reason to withdraw the HSS on the 120-minute route which is not to re-open until the 2012 season, rests with the high operating costs of the fuel-thirsty fast-ferry which is powered by four gas-turbine engines. In addition the route's generated most of its turnover during the period May-September, leaving the remaining months unsustainable, as such the company wants the route to be seasonal-only in the long-term.

HSS Stena Explorer departs Dun Laoghaire Harbour on her final sailing this season. Photo: Jehan Ashmore

Passengers and freight customers will instead need to use the company's other Dublin Bay route between Dublin Port and Holyhead. The 3 hour 15-minute central corridor route is served by two ro-pax vessels, Stena Adventurer (2004/43,532 grt) and Stena Nordica (2000/24,206 grt) which operate to a year-round schedule, for times click HERE.

What is not certain is the precise date for resumption of Dun Laoghaire-Holyhead services as Stena Line have only indicated that they hope to reopen in April or May nor it is outlined as to what type of fast-craft would operate the route next year.

With today's break in service for at least the next six months, this is the most significant absence of the revolutionary HSS (High Speed Sea Service) 1500 fast-ferry which made her official maiden voyage on the route from Dun Laoghaire on 10th April 1996. The only other notable occasions when the HSS was off-service was for the short spells to allow for annual dry-docking, refit, repairs or when the route in recent years was partially operated by Stena Lynx III.

The 1500 referred to the number of passengers the Stena Explorer could accommodate. She was the first of the three Finish-built HSS 1500 catamaran vehicle capable carrying craft to enter service on three routes from the UK. The next sister completed HSS Stena Discovery entered service in the same year between Harwich-Hook van Holland and the final of the trio HSS Stena Voyager entered the Belfast-Stranraer route in 1997. Several years ago the HSS ceased operating on the Dutch route and the HSS currently serving on the North Channel is due to be replaced by conventional ferries in mid-November as previously reported on Afloat.ie, to read more click HERE.

On the Dun Laoghaire-Holyhead service the HSS enjoyed the boom years, and at its peak there were five daily round trips. From 2006 onwards the routes fortunes began to decline due to the ending of duty-free sales, competition from low-cost airlines, and the increasing cost of fuel.

In order to stave off further losses, a series of cost cutting measures were implemented over the next five years. Firstly the sailing frequency was reduced then the passage times were increased to reduce fuel consumption at the expense of faster crossings. In addition the company resorted to withdrawing the Stena Explorer during the shoulder months surrounding the summer and as previously mentioned these sailings were covered by the Stena Lynx III.

When the Stena Explorer returned for the summer months, the Stena Lynx III switched to her normal high-season spell on Rosslare-Fishguard sailings in tandem with regular route vessel Stena Europe. This year she served as usual on the St. Georges Channel route with the last high-season sailing completed on 4 September.

Stena Lynx III remained initially at Fishguard until making a repositioning voyage to Dun Laoghaire via the Kish Lighthouse last Wednesday. She berthed adjacent to the now disused HSS berth link-span on St. Michaels Wharf. The Tasmanian built craft has spent previous winter layover periods in Dublin and last year in Dun Laoghaire whereas the Stena Explorer is expected to do so in her home port of Holyhead.

At the neighbouring Carlisle Pier, the former terminal where numerous steam-packets, 'mailboats' and the conventional Sealink/British Rail car-ferries served (the last being the Stena Adventurer better known as St. Columba built in 1977) there are plans for a national diaspora museum.

The centrepiece landmark building would form as part of the masterplan proposed by the Dun Laoghaire Harbour Company as part of a concerted effort to offset the reduced role of ferry operations. The masterplan is also to attract cruiseship business amongst other proposals envisaged.

Stena Line's HSS fast-ferry the Stena Explorer will be re-introduced on its Dun Laoghaire to Holyhead route this Friday, writes Jehan Ashmore.

The HSS (High Speed Service) operated 19,638 tonnes craft will run between 1 April to 13 September to cope with the additional demand over the summer period.

A single daily round trip is scheduled with a 10.00 hours sailing from Holyhead and a 13.15 hours sailing from Dun Laoghaire. Passage time is 120 minutes (2 hours).

The HSS can 350 vehicles and with 1500 passengers, the craft can handle higher volumes of seasonal summer foot passengers compared to the last route serving vessel, the 4,113 tonnes Stena Lynx III. The return of the HSS service links in with those intending to make onward journeys from Dun Laoghaire's DART commuter rail service to Dublin city centre and beyond on the national rail network.

Up to early January the route had been served by the Stena Lynx III which remains moored alongside Dun Laoghaire's St. Michaels Wharf. The craft which can take 627 passengers and 120 cars and marketed as the Stena 'Express' is to resume high season sailings starting in July between Rosslare-Fishguard.

In total the company carries over two million passengers on its four Irish Sea routes each year. An additional route between Belfast-Liverpool (Birkenhead) was taken over by the Swedish owned ferry company from DFDS Seaways late last year, is subject to regulatory clearance.

Until such clearance has been granted, this route will be operated separately from all other Stena Line routes. In the meantime the company advise until further notice to make bookings which will remain acceptable through the use of the DFDS website.