I sail on commercial ships for living, as an engineering officer. We only have about 10 people in the engineering department onboard most ships on which I sail--and we fix it all (can't very well call for help in the middle of the big pond). These ships are typically over 900 ft long and 100 ft abeam, and have motors which put out thousands of hp per cylinder (typical bore/stroke= 840mm x 2500mm). They run on heavy or intermediate fuel (heated, and purified, of course!). I also sailed on nuclear submarines as a nuclear trained enlisted, many years ago...

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Mahalo and Aloha,
S. L. "Red" Pike, Naval Architect/Marine Engineer, USCG Licensed Chief Engineer (Steam, Motor, and Gas Turbine)
Former nuc bubblehead (boomers)
"Sustained superior performance through continuous incremental improvement."

1987 300SDL White w/ Gray Leather interior, 160K (mine)
2009 Nissan Murano (leased - wife's)