Welcome to Alaska
This is a close up of the heat pipe radiators A word of credit here. Photos with a date stamp on them are the work of my wife Terri. Photos without date stamps are mine, her camera is newer and a bit fancier than mine.. Between the two of us we took 76 rolls of film on this trip. Rest easy, not all of them are in this photo set!
For an explanation of how these heat pipes work jump to http://en.wikipedia.org/wiki/Alaska_Pipeline