The fuel used by ships and boats is varied and ranges from diesel and gasoline to just wind energy. For instance, ships that carry cargos and containers mainly run on diesel; however, gasoline and sails are also commonly used. With fuel prices increasing exponentially, the demand for alternative energy sources to propel ships and boats is greater than ever. Electricity and solar energy are cheaper than diesel and gasoline, and small ships and boats are now using these alternative sources of energy. Boats that are primarily powered by electric energy are known as electric boats.
Maintenance, repair, and operations refer to the activity of fixing any broken-down or out-oforder devices or the process of preventing break-downs. This includes routine check-up and complete overhaul of the engine. Helicopter MRO activities are driven by an increase in the leet of newly-acquired military helicopters worldwide.