Not sure these days. Oars perhaps? š£
damn sure be cheaper
‘Great Green Fleet’ using biofuels deployed by U.S. Navy
WASHINGTON (Reuters) - The U.S. Navy formally deployed its āGreat Green Fleetā on Wednesday, sending warships powered by alternative energy to conduct operations in the Pacific three years after controversy over the price of developing new fuels provoked a fight in Congress.
In one case, it paid ***$424 a gallon for 20,055 gallons of biofuel based on algae oil.*** To test the Great Green Fleet in the summer of 2012, it spent nearly $27 a gallon for 450,000 gallons of biofuel, later mixed into a 50-50 blend. The $15-per gallon-cost was four times that of conventional fuel.