Yes, but I have to tell them when I race. I have declared occasional club races. Of course the rig risk increases, so they lower the cover to 66% for racing.
Thats about it.
Yes but damage to the rig while racing is excluded unless it occurs as the result of stranding, collision, or a few other causes.
Basically I'm not covered for overstressing the rig while racing; but it's a masthead rig built like the proverbial masonry facilities and regularly inspected, so I don't think I'm taking too much risk myself.
You must allow for everything going over the side. Mast, boom, spinnaker pole, standing and running rigging, mainsail, genoa, spinnaker, electronics, etc, etc.