How does the signal go underwater?
Radio signals will penetrate water. Freshwater is the best for getting clear transmission to your model and there are many experienced sub drivers who have operated (properly constructed) submarine models in depths in excess of thirty feet. Once you start getting additions such as chlorine or salt in the water, you will see serious reduction to the maximum depth you will be able to control you model. When operating at the surface, the only limit is your radio system. Submarines can be operated in heavily chlorinated pools, or even in the ocean, but you depth will be limited to a few inches, at best. Operating any deeper will require an antenna addition, as you’ll need to keep the antenna above the surface of the water in order to maintain control of your model.
