What type of propeller thrust reversing method (or methods) is or are used with a main propulsion slow-speed crosshead type diesel engine installation?

Correct Answer: Option C — Either a reversible engine driving a fixed-pitch propeller or a non-reversible engine driving a controllable-pitch propeller could be used.

Large low-speed crosshead diesel engines are inherently reversible, permitting direct drive with a fixed-pitch propeller. Alternatively, non-reversing medium-speed engines utilize controllable-pitch propellers to achieve astern thrust, providing operational design flexibility.