The Guard assists in Maintenance and trains (training) at the same time.
Noitice the small fuel tank, If you look under those hoods you would find that the prime movers (engines) are about the same size as what is in your pickup truck.

Photographed by Mark Beebe, November 6, 1994.
Added to the photo archive by Mark Beebe, February 6, 2006.
Railroad: Old Colony & Newport Railway.

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