target ship, the USS Salt Lake City, is shown in Figure IV.B.6. The daily doses to most nonbadged people serving on a particular support ship or boarding a particular target ship were calculated from these curves by using the onboard times that are documented in the support-ship logs. Some daily-dose estimates for particular people were based on cohort film-badge data, if available.
Estimates of dose due to external exposure to neutrons produced in a detonation (mainly for some close-in observers at NTS shots and crews of cloud-sampling aircraft) are based on calculations with radiation-transport models. The models calculate the free-in-air exposure in air as a function of distance from ground zero and estimate the shielding provided by trenches and aircraft to calcu