I ran that calculator for a hypothetical LAX-JFK transcon and came up with about 4.5 mrem (1mrem=10 usieverts). I did a stint in nuke power and TOTALED less than 200 mrem over FOUR YEARS. That's about 45 transcons. I'm at a regional, so I am just guessing, but a lineholder doing transcons would take only 6 months or so soak up the same zoomies that I did in 4 years of occupational exposure. Yikes. Hey B6, are you sure you still want those transcon turns?