>> well, are there regulations in maritime operations about hours on the engine? in aviation you've got to have a hundred-hour check if you're flying passengers. you've got to have an annual inspection. you've got to have the oil changed every 40 hours on most engines. there are checks and balances in aviation. i'm curious if there's checks and balances in maritime operations for engines that are carrying 4,000 people across the seas. >> yes, there are. there are what are called class society rules. there are the engine -- the largest engine manufacturer in the world is vartsilla in finland. they have requirements for the particular maintenance periods as well as the -- >> so there would be an engine log here? there would be an engine log -- >> absolutely. >> okay.