Cello to the Rescue
The Nirvana incorporates the latest in electronics compartment design. However, because the sheets must lead below to get to the servo motors that drive them, we have a mandatory hole in the compartment that can allow water in. The deck house is a secondary shield that does a good job at keeping water away from the hole, but the sheets actually carry water in on their own.
Since there is no way to block this water entry, the best thing to do is capture the water so it can't get into the electronics in the compartment.
Cello . . . One of the best solutions is to install a thin kitchen sponge (Cello brand works great). Cut the sponge to fit snugly on the starboard side of the compartment, above the servo mounting platforms. Cut the sponge to fit tight to the starboard (right) wall below the hole, and wedged in place between that wall and the servos. It should fit comfortably below the sail servo arm. Cut a notch in the sponge to allow the steering servo arm to move without hitting the sponge.
Then if any water enters the hole, it goes directly into the sponge and is easy to wring out.
Another cool tool - If you happen to get a lot of water into the compartment by some strange chance, you will find out that it is hard to get that water out. The best tool for this job is a small turkey baster or large eye dropper(syringe). A couple of quick slurps and the water is gone.