Now, I have to ask this question. Isn't there some sort of fuel gauge inside the locomotive. I would assume, what with these new digital dashboards that one of the crew in the cab could determine how much fuel was aboard by pushing a button on one of the many screens available.
Unfortunately, the article didn't state the type of engine this particular crew was aboard, but was the level of fuel in the tank THAT IMPORTANT to risk someone's life and limb by hanging over the side between the hand rail stanchions?