OPERATIONS TY 1. <A verimary mission of fesk Group 7,3 wae to provide for the security of the Eniwetok/Eikiat Danger Ares, Forces assigned & sceomplish this mission were the four DPEs of Nscort Iestroyer Avision Twelve augmented by Pc 15k6, Petrol Squatron Trenty~Fine, a siz fighter aircraft detachment of Composite Squadron Three, and the Exiwetok Underwater Petection Unit. 2. OF6 7.3%s ability to perform the security alesion vas United vy the strength of the forces provided for the purpose, and was still further reduced by the frequent diversion of security units _to other cutios ae the Cperntion progressed. Witkin these linits, effagtive security measures were carried out om very nearly the level Planned for the Operation, although often af the expense of adequate upkeep and treining. Security 3. EPPERSOF, RICHCLAS, PRILIT, ETESEAV and FE 15h6, unler Comaander Yacort Destroyer Division Twelve, formed the Surface Seourity "nit, I¢ wis thie unit's mission te prevent wifriendly forces from gaining intelligence of Operation CASTLE and to detect and counter hostile action egainst any unit of Joint Task Force SETEE, Patrol end escort vere the basic mans by which the alasion was _ Abi@u/He eccompli shed, The curface craft were reeronsitle for conédusting