David,
It is not formal racing, just a bunch of guys sailing around Balmoral. The challenge may be to sail around a mark or two and back, and whoever "wins" will have bragging rights, but nothing more.
Insurance -
www.windsurfing.org/insurance.htmIf you are a member of a club, you are covered, if not, then it is your responsibility.
Sail numbers - not needed to go for a twilight sail - because no results will be taken.
The highlight will be the social interaction with other likeminded sailors. If you want keen competition, there are plenty of comps running all over NSW (Wally, Raceboards, Formula etc) - Balmoral on a Tue evening is not one of these events, all are welcome, doesnt matter how bad you are, or what gear you have.
Come along, get wet, daylight savings will be gone before long.
JB