> The primary 24 volt electrical system of TRIESTE is powered by 56 twelve-volt, 48 ampere-hour, lead-acid batteries located in four aluminium saddle tanks fast

> The primary 24 volt electrical system of TRIESTE is powered by 56 twelve-volt, 48 ampere-hour, lead-acid batteries located in four aluminium saddle tanks fastened to the top of the float beneath the superstructure. Each of the four battery tanks or boxes is pressure- compensated through the use of transformer oil and, therefore, during submergence the batteries themselves are subjected to full depth pressure.’ Three of the boxes are allotted for powering the craft's five 3-horsepower electrical propulsion motors and for providing power to the lighting systems. > The propulsion system consists of five special General Electric 3-hp de motors. These motors are designed to operate in inert fluid (silicone oil) and are subjected to full ambient pressure during diving operations. > The motors themselves are in five different locations. Two of them provide horizontal motion forward and backward, two provide vertical motion either ascending or descending, and one is installed athwartships for turning. The motors all drive propellers through gear boxes. It actually does have electric thrusters. Interesting that they were able to make the batteries neutrally pressured.