Hi Chuck
This is on my projects list.
I will use a WIFI router with high power and one small netbook as controller.
Specification
1. 500 meters range
2. 2 webcams (one to see HB screen and other to see the boat view)
3. 1 or 2 7A battery
4. Everything inside one dry-box
One PC software will control motors and can view the webcam images.
This is the plan, but I donīt know when I will have time to work on.
Bruno