Keep it dry
This is simply one of the golden rules of RC boats as electronics and water do not mix in. In order to fully enjoy your hobby and minimise bad results due to breakdown, it is important to take care and maintain your boat and the electronics. Below are few tips I found out (thanks to those who have shared theirs with me) :
Most boats particularly those built by professionals are well built and so all you need is to maintain them, repair ships, clean them with clear water if you sail on the sea (hull & rigs). Water should not be able to find its way inside the hull and ultimately to the electronics. However the most popular “leaks” are through :
Aerial tube (ie TS2) so I’ve put a 25mm length of heat shrink tubing which fit the aerial and tube nicely with no space to let the water through.
Switch (for those who have one on the deck). Use a waterproof switch (the one with a rubber cap), put a bit of silicone around the deck hole and around the “O” ring, and finally add some grease inside the hole where the switch handle operates.
Hatch - Make sure they are properly in place and the adhesive dacron patches cover all around the hatch with no gaps. Just a bit of sticky tape won’t do and is a recipe for disaster. You can get sticky dacron from the listed suppliers on this site or from most sailmakers.
Mast step - mainly for those who have a keelstep type. Regularly inspect that there is no damage to it.
You can also protect your receiver by putting it in a rubber balloons (like the ones you inflate for parties). Once inside seal the end with a cerflex band. But I would recommend to leave it outside the balloon while at home so the air can get to it and avoid humidity at all cost.
It may be silly but make sure that your drain hole plug is properly inserted or cover the hole with some sticky dacron.
Once rinsed and dry remove at least 2 patches
to ensure a good airflow through the hull while storing the boat.