the shine dose to MOLALAfrom the YAGs. Depending on their involvement with YAG-related activities, MOLALA crewmembers could have been entirely below to entirely topside during the YAG exposures. Thus, shine doses could range from nearly 0 to 2 1/2 times the calculated value. The uncertainties in the parameters of the ship contamination model, as discussed in Reference 4, resulted in factor-of-three uncertainties in dose. However, a few data have emerged, such as on USS CURTISS as discussed in Reference 1, that suggest a much greater systematic accuracy than this for the model. Therefore, the present uncertainty analysis concentrates on the random variations of the parameters among ships. The largest such uncertainty is that in the saturation level of contaminants. The bounding S-values for each type of ship, as determined in Reference 4, are used. For destroyers, these are 1257 and 2683; for patrol craft, 1624 and 3092, and for all other ships, 1172 and 2820. The degree to which the ship apportionment factor, Fg, may be unrepresentative of average crew positions below was estimated in Reference 4 as a factor of 1.5. This is used herein except for PC-1546, which has an apportionment factor of .67, vice the .39 or .33 of the other ship types in this report. Where little shielding is afforded by a ship, its fractional uncertainty tends to be less. Actually, fractional uncertainties are more constant for the quantity 1-Fg. Onthis basis, a value of .67+.10 is estimated for PC-1546. The water intensities affect the time to saturation. However, except where ships moved frequently from one environmentto another, the rate of buildup of contamination has only a modest effect on doses. Comparedto the previous uncertainties, that in time spent below also has a minor impact on the dose from ship contamination. Calculations are made involving coupled treatments of those components of dose based on waterintensities. All attendant parameters are taken as systematically high-sided to determine an upper limit in dose (or low-sided for the lower limit). Thus, the highest water intensities, saturation levels, and apportionmentfactors are used throughout a crew's operational exposure to determine the combined upper-limit dose from ship contamination plus water shine. The uncertainties are taken to be systematic to obtain the greatest credible range of dose as well as to facilitate the partition of calculated doses into periods for comparison with film badge dosimetry (section 6). 86