The Admiral's Cup is an international yachting regatta. For many years it was known as the unofficial world championship of offshore racing.
The Admiral's Cup regatta was started in 1957 and was normally a biennial event (occurring in odd-numbered years) which was competed for between national teams. However the event was not staged in 2001 and was last held in 2003. It was cancelled at short notice in 2005.
The 2003 event did not follow the normal format and allowed entries from any yacht club affiliated to a national authority, thus allowing the possibility of several teams per country.
From 1957 to 1999 the cup was competed for between national teams, each having three boats. Initially only Great Britain and the United States took part but, in later years, many other teams also participated. The Fastnet race was part of the Admiral's Cup during this time.
The 2003 event, the last held, was planned to be based in Dún Laoghaire in Ireland, but this was changed at short notice for reasons that are still unclear. In addition, instead of being a competition between national teams, the event was competed between yacht clubs, each with two boats.
The 2005 event was cancelled in April of that year, only months before the event was to be held.
As of April 2008 there was no planned date or format for a next event and the Admiral's Cup's future is uncertain. However the RORC was looking into reviving the event for 2011."RORC Enlist Skandia To Help Revive the Admiral’s Cup". Admiral's Cup. Royal Ocean Racing Club. Retrieved 2009-07-28.