I'm surprised and suspicious to see a claimed PV efficiency of 18.8% as the panels are laying flat, which makes for a legitimate rating only at noon on the equator.
The boat weighs 89 TONS, holds 64 people BUT only has an engine of about 90 HP with an average speed of 5 knots.... Right.
Tides and rivers can run waaay more than that. For example:
"The Gulf Stream has an average speed of four miles per hour", according to NOAA.
Somebody needs to stick some sails on this thing.
"Timid men prefer the calm of despotism to the tempestuous sea of liberty" TJ