[john70t]

Originally Posted by kach22i

BLUEFISH ZCC BLUEBIRD MARINE SYSTEMS TANK TEST MODEL CONSTRUCTION AUTONOMOUS UNMANNED ROBOT BOAT SHIP ASV COLREGs BLUE TORPEDO

I was thinking the same shrouded drive
-except with an adjustable internal venturi shape, same as jet tech,
-with an Archimedes screw pump with an increasing compression twist to instead of cavitating propeller blades,
-and with an extendable sleeve to deaden cavitation noises and heat of output.