with the Atomic Energy Commisslcn technicel operations on the Zero Isltmd and control station island were still being installed. The radio section received shipment of MRO-Z equipments end then completed the instelldion of the telet~p ci~uit of Task Group 7.4 at Kwajslein (ch=mel 404) on 17 Februery 1948. Shortly theree@ter,the MM-2 equipment (channel 412) which wcs to be used as a bac~up for the JJ@RC-1 equipment to the MT. McKINIEY was instslled end ready for operation. The redio section also tistelled a Gates entertainmentbroadtesting station on Eniwetok and turned it over to the Speciel Sefices officer of Task Gralp 7.2 for Opersticn. Msintemnce, hcqrever,continued to be a responsibil.lty of the radio section. The belsnce of the time eveileblo pending the srrivel of the MT. McKIMEY was utilized in final preppsetion of all equipment end in intensive treining of personnel in equipmmt oper~tion and procedures in the Joint Reley StetiGn. Initiel cont~ct wms made with the ICC*7 while still et se~ 8nd channel 402 wes turned over to traffic on 15 Merch 194S. The MT. McKINLEY arrived at Eniwetok on 16 March 194S and efforts were mede to activate the VHF redio telephone links to the shore. Consider&ble difficulty wes experienced in establishing these links between ship md shore. This wes ceused principallyby frequency congestion in the A.N/TRCspectrum End by interferencefrom other facilities h use eboard ship. l.lthoughthese diffictities curtailed telephone communicationsbetween the ships end shore for @ short period, there wes never a complete sbsence of redio telephone communications. The MRC-2 equip~nt (chsnne1412) WES elso used es e back-up for the VHF teletype links during the shakedown end testing periods. Much effort h8d to be expended in deriving euiteble frequencies end entennee. Vertically md horizontallypolarized beems, dipoles end ground plenes were 62 Section XI