Dun Laoghaire Regatta is held every two years, typically in the first weekend of July.

As its name suggests, the event is based at Dun Laoghaire Harbour. Racing is held on Dublin Bay over as many as six different courses with a coastal route that extends out into the Irish Sea. Ashore, the festivities are held across the town but mostly in the four organising yacht clubs.

Dun Laoghaire Regatta is the largest sailing regatta in Ireland and on the Irish Sea and the second largest in the British Isles. It has a fleet of 500 competing boats and up to 3,000 sailors. Scotland's biggest regatta on the Clyde is less than half the size of the Dun Laoghaire event. After the Dublin city marathon, the regatta is one of the most significant single participant sporting events in the country in terms of Irish sporting events.

The modern Dublin Bay Regatta began in 2005, but it owes its roots to earlier combined Dublin Bay Regattas of the 1960s.

Up to 500 boats regularly compete.

Up to 70 different yacht clubs are represented.

The Channel Islands, Isle of Man, England, Scotland, Wales, Northern Ireland, Ireland countrywide, and Dublin clubs.

Nearly half the sailors, over 1,000, travel to participate from outside of Dun Laoghaire and from overseas to race and socialise in Dun Laoghaire.

21 different classes are competing at Dun Laoghaire Regatta. As well as four IRC Divisions from 50-footers down to 20-foot day boats and White Sails, there are also extensive one-design keelboat and dinghy fleets to include all the fleets that regularly race on the Bay such as Beneteau 31.7s, Ruffian 23s, Sigma 33s as well as Flying Fifteens, Laser SB20s plus some visiting fleets such as the RS Elites from Belfast Lough to name by one.

Some sailing household names are regular competitors at the biennial Dun Laoghaire event including Dun Laoghaire Olympic silver medalist, Annalise Murphy. International sailing stars are competing too such as Mike McIntyre, a British Olympic Gold medalist and a raft of World and European class champions.

There are different entry fees for different size boats. A 40-foot yacht will pay up to €550, but a 14-foot dinghy such as Laser will pay €95. Full entry fee details are contained in the Regatta Notice of Race document.

Spectators can see the boats racing on six courses from any vantage point on the southern shore of Dublin Bay. As well as from the Harbour walls itself, it is also possible to see the boats from Sandycove, Dalkey and Killiney, especially when the boats compete over inshore coastal courses or have in-harbour finishes.

Very favourably. It is often compared to Cowes, Britain's biggest regatta on the Isle of Wight that has 1,000 entries. However, sailors based in the north of England have to travel three times the distance to get to Cowes as they do to Dun Laoghaire.

Dun Laoghaire Regatta is unique because of its compact site offering four different yacht clubs within the harbour and the race tracks' proximity, just a five-minute sail from shore. International sailors also speak of its international travel connections and being so close to Dublin city. The regatta also prides itself on balancing excellent competition with good fun ashore.

The Organising Authority (OA) of Volvo Dun Laoghaire Regatta is Dublin Bay Regattas Ltd, a not-for-profit company, beneficially owned by Dun Laoghaire Motor Yacht Club (DMYC), National Yacht Club (NYC), Royal Irish Yacht Club (RIYC) and Royal St George Yacht Club (RSGYC).

The Irish Marine Federation launched a case study on the 2009 Volvo Dun Laoghaire Regatta's socio-economic significance. Over four days, the study (carried out by Irish Sea Marine Leisure Knowledge Network) found the event was worth nearly €3million to the local economy over the four days of the event. Typically the Royal Marine Hotel and Haddington Hotel and other local providers are fully booked for the event.