Martijn,

The stuff listed is good but what is most important is to have the ability to contact help and report your position AT ALL TIMES, including if you get separated from the boat and be able to survive the wait for help. That requires that you are wearing what you need to do that and/or have it ON YOU and that it is in operating condition after being submerged and/or "fire-hosed" for hours. That will take care of the worst case scenario where you are still alive and concious. After that it is just a matter of having what you need to be more comfortable and race better.

Again, you must have the necessary equipment on your person because there will be times when having it inside the boat or even on the tramp is not good enough. BTW, this applies to large multihulls too, not just beach cats.

Prepare well and have fun!