I'm not sure how you can say that only one site would go into an inshore category....
If you was to look at Organizations, you would find most url's listed on that page belong to inshore.. An Organization should be a Governing body... The UIM which is the main governing body is listed there, then after the UIM, each Nation has it's own National Authority, UK is the RYA, USA is the APBA ( But a bit like boxing, the Amercian Federation, had a breakaway which is called the APB ) FIM is for Italy etc.. The F-1 World Championship, I suppose yes in some ways is it's own organization, because it is a promoted / contracted class to the UIM, but they run mainly inshore, the same could be said of the Champ Boat series, They run under the APBA, but are inshore classes.. You can't run a tunnel boat over the open sea, at 140MPH. The Hydroplane classes, are all mainly inshore classes.
Anyway, I did apply again, and got turned down again.. Although the response was more positive, I think I have to move down a few levels, out of powerboat racing and into a lower section...