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Dublin Bay Cruises Retain Passenger Vessel By Converting to Hydrogenated Vegetable Oil

24th January 2025
 Dublin Bay Cruises have decided to retain their St. Bridget, having converted the excursion vessel from fossil fuels to an alternative use of hydrogenated vegetable oil (HVO), which they claim will
Dublin Bay Cruises have decided to retain their St. Bridget, having converted the excursion vessel from fossil fuels to an alternative use of hydrogenated vegetable oil (HVO), which they claim will "dramatically reduce emissions.". Above sightsees arrive at Dun Laoghaire Harbour on the final day of last year’s season, but which is to resume in 2025, starting late March. Credit: Jehan Ashmore

Dublin Bay Cruises has become the first domestic sea-based passenger excursion operator in the country to switch from fossil fuels to an alternative fuel using hydrogenated vegetable oil (HVO).

The company's existing 100-seat capacity vessel, St. Bridget, has received a changeover carried out on the 26-metre boat, which has been in service since the company’s inception in 2012. They operate 7 cruises throughout the bay linking Dublin Port, Howth, and Dun Laoghaire Harbours.

Dublin Bay Cruises say they remanufactured the engines of St. Bridget to make the 1978-built former west coast islands ferry, more fuel-efficient and, as a result, "dramatically reduce emissions.".

The alternative use of HVO as a low-carbon biofuel serves as a direct replacement for regular diesel fuel for the St. Bridget, which also runs cruises around Ireland’s Eye off Howth and Dalkey Island along with views of Killiney Bay and Wicklow mountains.

HVO is produced by treating waste plant matter with hydrogen, which means the alternative fuel does not release any additional carbon emissions into the atmosphere.

DBC claims that using HVO as a fuel will reduce emissions by up to 90%. In addition, according to the seasonal operator (which is to resume in March), they exceed the climate targets set by Ireland and the EU.

Commenting on the development, DBC founder and M.D., Eugene Garrihy, said, "Recently, Dublin Bay Cruises faced a crucial decision—whether to invest in a larger vessel for increased passenger numbers or to reconsider our approach and focus on sustainability."

“After careful thought, we chose the latter. Our choice reflects not just a business decision but a responsibility to the environment. and the future of our coastal communities. We need to slow things down.”

More BusinessPlus reports on the operator in Dublin Bay, which is a UNESCO-designated biosphere that Garrihy describes as one of the most beautiful marine environments in the world.

Jehan Ashmore

About The Author

Jehan Ashmore

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Jehan Ashmore is a marine correspondent, researcher and photographer, specialising in Irish ports, shipping and the ferry sector serving the UK and directly to mainland Europe. Jehan also occasionally writes a column, 'Maritime' Dalkey for the (Dalkey Community Council Newsletter) in addition to contributing to UK marine periodicals. 

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Dublin Bay

Dublin Bay on the east coast of Ireland stretches over seven kilometres, from Howth Head on its northern tip to Dalkey Island in the south. It's a place most Dubliners simply take for granted, and one of the capital's least visited places. But there's more going on out there than you'd imagine.

The biggest boating centre is at Dun Laoghaire Harbour on the Bay's south shore that is home to over 1,500 pleasure craft, four waterfront yacht clubs and Ireland's largest marina.

The bay is rather shallow with many sandbanks and rocky outcrops, and was notorious in the past for shipwrecks, especially when the wind was from the east. Until modern times, many ships and their passengers were lost along the treacherous coastline from Howth to Dun Laoghaire, less than a kilometre from shore.

The Bay is a C-shaped inlet of the Irish Sea and is about 10 kilometres wide along its north-south base, and 7 km in length to its apex at the centre of the city of Dublin; stretching from Howth Head in the north to Dalkey Point in the south. North Bull Island is situated in the northwest part of the bay, where one of two major inshore sandbanks lie, and features a 5 km long sandy beach, Dollymount Strand, fronting an internationally recognised wildfowl reserve. Many of the rivers of Dublin reach the Irish Sea at Dublin Bay: the River Liffey, with the River Dodder flow received less than 1 km inland, River Tolka, and various smaller rivers and streams.

Dublin Bay FAQs

There are approximately ten beaches and bathing spots around Dublin Bay: Dollymount Strand; Forty Foot Bathing Place; Half Moon bathing spot; Merrion Strand; Bull Wall; Sandycove Beach; Sandymount Strand; Seapoint; Shelley Banks; Sutton, Burrow Beach

There are slipways on the north side of Dublin Bay at Clontarf, Sutton and on the southside at Dun Laoghaire Harbour, and in Dalkey at Coliemore and Bulloch Harbours.

Dublin Bay is administered by a number of Government Departments, three local authorities and several statutory agencies. Dublin Port Company is in charge of navigation on the Bay.

Dublin Bay is approximately 70 sq kilometres or 7,000 hectares. The Bay is about 10 kilometres wide along its north-south base, and seven km in length east-west to its peak at the centre of the city of Dublin; stretching from Howth Head in the north to Dalkey Point in the south.

Dun Laoghaire Harbour on the southside of the Bay has an East and West Pier, each one kilometre long; this is one of the largest human-made harbours in the world. There also piers or walls at the entrance to the River Liffey at Dublin city known as the Great North and South Walls. Other harbours on the Bay include Bulloch Harbour and Coliemore Harbours both at Dalkey.

There are two marinas on Dublin Bay. Ireland's largest marina with over 800 berths is on the southern shore at Dun Laoghaire Harbour. The other is at Poolbeg Yacht and Boat Club on the River Liffey close to Dublin City.

Car and passenger Ferries operate from Dublin Port to the UK, Isle of Man and France. A passenger ferry operates from Dun Laoghaire Harbour to Howth as well as providing tourist voyages around the bay.

Dublin Bay has two Islands. Bull Island at Clontarf and Dalkey Island on the southern shore of the Bay.

The River Liffey flows through Dublin city and into the Bay. Its tributaries include the River Dodder, the River Poddle and the River Camac.

Dollymount, Burrow and Seapoint beaches

Approximately 1,500 boats from small dinghies to motorboats to ocean-going yachts. The vast majority, over 1,000, are moored at Dun Laoghaire Harbour which is Ireland's boating capital.

In 1981, UNESCO recognised the importance of Dublin Bay by designating North Bull Island as a Biosphere because of its rare and internationally important habitats and species of wildlife. To support sustainable development, UNESCO’s concept of a Biosphere has evolved to include not just areas of ecological value but also the areas around them and the communities that live and work within these areas. There have since been additional international and national designations, covering much of Dublin Bay, to ensure the protection of its water quality and biodiversity. To fulfil these broader management aims for the ecosystem, the Biosphere was expanded in 2015. The Biosphere now covers Dublin Bay, reflecting its significant environmental, economic, cultural and tourism importance, and extends to over 300km² to include the bay, the shore and nearby residential areas.

On the Southside at Dun Laoghaire, there is the National Yacht Club, Royal St. George Yacht Club, Royal Irish Yacht Club and Dun Laoghaire Motor Yacht Club as well as Dublin Bay Sailing Club. In the city centre, there is Poolbeg Yacht and Boat Club. On the Northside of Dublin, there is Clontarf Yacht and Boat Club and Sutton Dinghy Club. While not on Dublin Bay, Howth Yacht Club is the major north Dublin Sailing centre.

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