Brian and all....this reminds me of a local situation for Aircare Helicopters. I am told they must have a full tank of fuel, thus after each run they top-off the tank. A guy I met at the gym (wait-what-Greg goes to a gym!) told me he was working on remodeling a copter pad at a hospital in Cincinnati, and often saw the chopper come in. The pilot asked him if he and his friend wanted to take a ride. They had to go to the airport about 10 miles away, to refuel, for the reasons stated. I asked how he got back, and he said the chopper! Then I asked...."Well now would he have to return to refuel again"? He didn't think so!!! Anyway being an important lifeline I can see this logic of keeping half tank for Brian, and nearly full for Medical Choppers.
Greg