While I personally thought it seemed to be quite correct, what do y'all think? The "Making Of" segments really confirmed my thoughts.
The only part that could be argued as not-quite-so-accurate is the radiation sickness the sailors suffered. Please note I don't really know this, I just picked it up from the segment on how the make up was done. It (the segment) said that due to the actual limits of the make up, the true swelling and such one suffers from radiation sickness could not be modelled. Even if it could, it could've been too strong for some viewers or even worse, some could've thought that they were over-doing it.