Engine: Electricity

1. A the hull's magnetic fields are aligned with a solid-state degaussing circuit using SCR's
2. B all ship's service alternators have additional temperature sensing devices and a thermal recorder installed
3. C machinery on deck and in the engine room is first coated with zinc chromate before final painting
4. D straps connect the rudder with the hull and the propeller shaft is grounded through a slip ring/brush arrangement

Tip: press A-D to answer