Engine: Electricity

1. A It is an electric drive system in which the motor drives a controllable pitch propeller (CPP).
2. B It is an electric drive system where the propulsion motor is installed in a submerged housing capable of swiveling.
3. C It is an electric drive system that incorporates a DC motor.
4. D It is an electric drive system using water jets.

Tip: press A-D to answer