Marine Engineering

We always hear this statement or tell others that: "Oh i have worked  on 10S80ME engine on my last ship" or "my last ship was propelled by SULZER RTA 68 -7-flex engine" Now do we really understand what the above statement means or what are we talking about? We have worked on different types of MAN and Sulzer engines in the past and will continue to do so.  We have come across so many engine designations and types in our past, but how many of us know exactly what these designations mean?  MAN B&W Engine Type Designation 10 S 90 M E - C9 - GI - EGRBP 10      - Number of cylinders S        - Stroke/bore ratio {G   'Green' ultra long stroke                                          S    Super long stroke                           ...