The component labeled "A" on the engine reversing device shown in the illustration, performs its function by transmitting _______. Illustration MO-0125

Correct Answer: Option D — a pneumatic signal which activates a hydraulic control cylinder allowing the camshaft to shift axially

Direct-reversing marine diesels use a pneumatic control signal to actuate a pneumatic-hydraulic servo cylinder, which shifts the camshaft axially to engage astern cams and reverse engine rotation.