All you need for racing right here
ISORA Offshore - Dún Laoghaire To Holyhead
A Matrix giving distance and course from one CHPSC mark to another. This is provided to assist competitors
A Chartlet of the bay showing the position of the Racing marks. A must have item in the cockpit whilst racing!
A library of all CHPSC courses
The full list of racing marks and buoys with coordinates - is available in pdf format. Available by following the link