In Valdez on oil spill response barges we HAVE to be response ready
24/7. So, we run dual John Deere/SDMO gensets. Every 3 days we swap
gensets. Every 500 hours we do an oil/filter change and air filter
change per manufacturer's. Every 2 hours at a minimum we inspect the
engine space and fill up the day tank, verifying genset gauges.

We also have a third genset in a separate space, which is run once a
week in cold weather, and an emergency genset for certain lights and
all radios, and a backup portable emergency generator.

The main genny's run our electric heat, all the deck lights, block
heaters for equipment hydraulic packages, and MOST importantly, the
heaters for the water and MSD tank. (Marine Sanitation Device)

Engines are a fair amount of work!! :)