Rolly that was the very video that I mentioned in another thread,it help me make sense of what my boilerman buddies were talking about.While I was in weapons fire control with my first computer that I ever saw first hand.And listening to the turbine whine (the fireroom was also "blackmarket" for sodas at dollar on the dime, while we were under way and the Captian wasn't looking..officially at least.).On the equator ,I would wearing jackets for the 40F that plot was getting off the reefers and there would be heatwave coming out fireroom deck hatch that was open and felt like you walked pass clothes dryer exhaust.