It te nected that structures do mt fail at som crlti~ar bit fist ove: a Tange cf xesa.re€y ‘marnan: 2 Lactoxs level, pressure of 3), the damege is sumexhat croporifona to the pressure Ths observation or structures at ice pessoa leve’c ton be eytrapopates with some degree of confidenss without expecting 2 sudden and complete collapse. in most cases, there is always sane weak elameni OF a structiuwe which will fei. first; guch as boewing in cf & panety a4 stress. 2.3.4 Vehiczes There is of no apparen? reoulrameant t: everuste vehicles from Parry to E-iwetok nor any apr esiak edvart age in doine &. Al} canvas ters should be renceved from the vehlejes wiminhdelds The velic le eheuvd fae should be lowered fiat er ceneved er-irely he berter prota ites directiy away et teward the Piast alfhoup: ti as fal for the radiater and headlight: is after ao3 if the pyle ein far awoy from the rlast. 2.325 Aircraft All aircraft shoulc be evarusted wherever meseibe. fom smia@il aircraft (including helicopters) which cannot be eva.nated tha main wings should be removed, and if lett in the cpen, the airersfs sheuld face toward the biast. No damage is expested te hults or any part of tete oa. 2.3.6 Boats SF oad which is usually subjected to wave attien The .7 pal reves in aguivaert to a head of a i/2 foat of water which such boats habituatay withetend oO as 3 tr superstructures of those craft are more suscep ble to Lag dang. Wi that the unbalanced peak orersure is of very sheve duration, ahanl oD) Beals being rapidiy engulfed by the pressure waves for example, a mas: oF ano in t diameter will feel the peak pressure fer anpreximately fh of ¢ miliisccons. Following the peak pressure ths biast winds will be of the order cof iti * wh 50 miles per hour at Parry er kniwevok tu> these craft. habitually withsvand these winds. 2.3.7 Storage Tanks Storage tanks for fluids should be left full, both to add mass as well as to prevent the plates from buckling in. CHAPTar 3 THeMAL oFFECTS 304 General Like biast, an estimata of thermal effects required enanescs te certain uncertainties which will be settled by some cf the axnerimants on the Operation itself. Fertunately, egain, the estimates for thermal radiation are sufficiently lew that neo prohibt tive prcbiems are introduced.