Whether you use the waterproof Splash Drone 3 on saltwater or freshwater, it's perfectly fine. Splash Drone 3's components are treated to prevent any corrosion that may happen. Though just like when you use the boat, make sure to rinse the motors with fresh water after you will use it. And because it's waterproof, you have a choice where to land or take off- you can do it on water or on land. And if by chance the Splash Drone 3 lands upside down, fret not. The Splash Drone 3 will float on water and can just be turned right side up to take off again.
Here's a review of Splash Drone 3 from Werner Lubbe.and see what he has to say.
And if by chance you would need spare parts, Urban Drones got them for you. Splash drone 3 available in the USA at UrbanDrones.com. It shipped from the US, so place your order now by calling 954-213-4977.