In addition to achieving a speed reduction for efficient propeller operation, what statement represents other possible functional purposes for reduction gears?

Correct Answer: Option B — Reduction gears can be used for propeller thrust reversal and reduction gears can be used for multiple prime mover inputs.

Marine reduction gears are engineered not only to lower shaft speeds for optimal propeller efficiency but also to incorporate reversing mechanisms and permit dual or multiple prime mover inputs into a single reduction train.