ABT•TRAC Hydraulic Thrusters deliver more thrust per horsepower than any other thruster available. ABT•TRAC's twin counter-rotating propellers are more efficient and can reach higher horsepower than single prop hydraulic thrusters. ABT•TRAC hydraulic thrusters are fitted with high efficiency piston motors. They are available in seven sizes, from 8 inches up to 28 inches. The 8 through 12-inch thrusters are available in a DC version and all ABT•TRAC thrusters are available in AC versions. Thruster control is available in single or proportional speed. Proportional thruster control enables precise maneuvering control.