Yes, the 360 Angler and Escape are both designed to withstand the damage of salt water. The drive itself is out of the water in a sealed casing and the frame is constructed with marine coating to prevent exposure.
The hulls of these boats are very low profile so only the seat and paddler will be exposed to the wind. The power of the pedal drive system does all the work for you going against the wind.
Don't see the answer to your question? Ask the project creator directly.