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World Sailing Offshore Special Regulations

NED7025 Holmatro in challenging conditions in the 2008 Rolex Commodores' Cup. Photo: Rolex/Kurt Arrigo

The purpose of the World Sailing Offshore Special Regulations (referred to as OSR below) is to establish uniform minimum equipment, accommodation and training standards for monohull and multihull yachts racing offshore.

The RORC categorises its races depending on the duration, exposure of the race course, distance to the shoreline and the degree of self-sufficency required. The RORC also includes prescriptions to the OSR.


Inshore Events such as the RORC Easter Challenge or IRC National Championship are usually OSR Category 4 plus RORC Prescriptions.
A RORC Offshore Weekend Race is usually OSR Category 3, plus Liferafts as set out in Category 2, AIS Transponder plus RORC Prescriptions.
The Rolex Fastnet Race, Round Ireland Race, Ile de Ouessant Race and Rolex Middle Sea Race are OSR Category 2 plus RORC Prescriptions.
The Sevenstar Round Britain and Ireland Race and RORC Transatlantic Race are Category 1 plus RORC Prescriptions.

Please check the RORC's Notice of Race for the OSR Category required for the race you enter.

Below are links to the ISAF etxracts for each Category and the RORC Prescriptions:



RORC Office Locations Map
Royal Ocean Racing Club
(General Enquiries, Membership, House)

20 St James's Place

 +44 (0) 20 7493 2248
 +44 (0) 20 7493 5252
Royal Ocean Racing Club
(Racing Enquiries)

82 High Street
Isle of Wight
PO31 7AJ

 +44 (0) 1983 295 144
 +44 (0) 20 7493 5252
RORC Cowes Clubhouse

The Parade
Isle of Wight
PO31 7QU

 +44 (0) 1983 293581
 +44 (0) 20 7493 5252
RORC Rating Office
(Seahorse Rating Ltd)

Seahorse Building, Bath Road
Lymington, Hampshire
SO41 3SE

 +44 (0) 1590 677030
 +44 (0) 1590 679478

Royal Ocean Racing Club - since 1925

The RORC was founded in 1925 to encourage long distance yacht racing and the design, building and navigation of sailing vessels in which speed and seaworthiness are combined. Today the club encourages ocean, long distance and other forms of yacht racing and yachting activity.