As shown in the illustration, if the port propulsion motor field excitation circuit experienced a failure, what individual component failure would allow the use of the standby excitation transformer and standby field controller to resume normal operation? EL-0164

Correct Answer: Option C — port field controller

When an excitation control loop fails in a redundant marine propulsion architecture, transferring control to the standby field controller restores automated regulation of the main motor field excitation circuit per IEEE 45 redundancy standards.