3-TT TT TOT TT vs T T_T 1 TTT TT T ([\ _ ae \ \ r\ 2 \ o = _ = a s ff = Ss ! wo -~ N E oat E \\ \ ob : 7 4 a inet ? ( 4 - WUE4 4 1 1-1 Lut ' GZ ] SS Ltt nt 140. \ C ° ie 4 \ c iS i er = —S 1 | Lr WY \ = 5 ol. ran NNW 60 a e ~ ~ 2 0.5 u a 20 {J} 0.5 a, til Lit 0 : ft | Li 0.3 Jt | i Distance From GZ, Statute Miles Figure 141. Operation HARDTACK I Umbrella. Idealized rate contours in r. (Contours represent cumulative dose to 6 hours.) 239