Something similar with CCTV has been done for remote air traffic control towers. http://www.popularmechanics.com/flight/a20075/saab-remote-ai...
Also add superhydrophobic coating and or supercavitation to reduce the water drag. That should be able to reduct fuel consumption even more. https://en.wikipedia.org/wiki/Supercavitation http://www.gizmag.com/ghost-super-cavitating-military-boat/2... https://en.wikipedia.org/wiki/Superhydrophobic_coating https://www.rochester.edu/newscenter/superhydrophobic-metals...