As shown in the illustration, the change-over switch is what type of device? EL-0058

Correct Answer: Option D — double-pole, double-throw switch

A double-pole, double-throw (DPDT) switch controls two separate circuits simultaneously, allowing the operator to toggle between two different power sources or load paths. In the context of navigation light circuits, this configuration enables the selection between primary and secondary filaments or power supplies to ensure continuous operation during emergencies.