So where would you place the Nimrod R crews in this? Some of their now unclassified missions were definitely on the risky side. Baltic, east of the North Cape etc. Or the handful of Canberra crews who did solo recce flights into USSR? Or the WIWOLs on QRA trips into the Iceland Faroes gap with an unreliable jet, no real navaids and a fuel gauge that was calibrated between not enough and pitiful?