Amex U tg JTF SEVTa..Jpera$?.on PIh N6. 1-58, NATUML DISASTM PLAN unsafe for pxmtectionof life and propertyunless they are strongly braced and heavily sandbagged. Quonset type warehousesare potential sourcesof danger in the event of a typhoonsince securing them is a pzmJectof such magnitudethat it cannotbe done within the resourcesand time availableafter receiptof the typhoon Warnhlg ● e. The folhving characteristics of ENIl\lYN3iC and FIIIJNIAtollsserve to decreasethe probabil.it y of serieusdamagedue to the effects of a tidal wave: (1) The botton slope off the Atollsis too steep to all.iw the waves opportunityto reach destructiveheights,also reflection off such steep slopes are knownto reducethe wave height as much as 50 percent. (2) The most prnbabledirectionof amm’eachby a tidal wave is from the North, and since all mayor camp ~ites are in the southernpart of each atoll the effectswould be somewhat reduced. The coral reefs aroundthe Ato- providean excellentbreakwater,and the major portionof wave energy is dissipatedon the reefs. f. Alert Plan - ‘l@hoon and Tidal :’?ave (1) In the event a forecastindicates that one of the conditions of typhoon alert should be assumedby the JTF, information will be disseminatedby the most expeditiousmeans to all Task Groups, Hq Comdt JTF SEVEN, and transitshipping. The followingconditionsof typhoon alert are establishedfor the “m: 111 - “’indsof fifty (50) knots or Mre (a) COrlDITION anticipatedwithin forty-eight(48) hours ● (b) CONDITIONII - ~~~ds of fifty (50) hots or moru anticipated withim twenty-four (24) hours. (c) CONDITIONI - Winds of fifty (50) knotsor more anticipatedwithin twslve (1.2)hours. will receivetyphoonconditionwarnings (2) JTF-7?!eatherCentral. from the Commander1st I ‘eather11’ing.The WeatherCentralwi~ immediatelyrmtify CJTF-7 and all Task Groups throughnormal i~eat her Communicant ion channels. (3) Due to the rapid advanceof a tidal wave, little advance warning is anticipated. Iihena warningis receivedby C~-7P it will be disseminatedby the most expeditiousmeans. g. Aesumtions. This plan is baaed on the assumptionsthat: (1) JTF SEVEN will receivetyphoonwarningstwenty-four(2f+)to forty-eight(48) hours in adv~ce. -. (2) Subsequentto ~ceipt of a typhoonwarning,CJTF S~ order total or partial.evacuationof ENIWTOK and/or BIKINI Atolls. (3) JTF SEVEN will receiveat least two (2) hum to arrivalof a tidal wave. .U-2 warning pd.m