Coil is waterproof, but you have to be careful not to let any water run down the stem by raising the coil higher than the control box.. You might think that is easy not to do, but just sitting it down on the ground in the wrong position will cause water to run down hill......
As stated, be very careful of the water through the shaft. If you set it down, you run a risk. Also are you looking to run in fresh or salt water? The Ace will be unstable in salt water. At the beach the Ace does best in the dry sand. Take care, and happy hunting!