The barrels are also a nice waterproof place to put the Jetson Nano computer, gps, 4G adapter, and Swarm sat link. They are so large that getting rid of heat is not a problem.
The barrels are also a nice place to put some solar panels, as the culverts will be in full scale.
We made a previous solar powered model with two motors. For that one we programmed a phone with App Inventor and had the phone talk to a bluetooth relay controller to control the two motors. But that was kind of small for the ocean (about 4 feet).
This new one will have two trolling motors. We are using Python on a Jetson Nano. It should be able to handle normal weather in the Caribbean.
We will train a neural network on the Jetson Nano to recognize different boat and ship types. Then when it sees something it can send back a short code. This is nice because the bandwidth on the Swarm Sat Link is limited. We can also send messages to the model giving it new waypoints to go to. With a number of these we could patrol the ocean near Anguilla for illegal fishing activity.