<prompt> Bhala okuqhubekayo kwalesi sigaba - Eminyakeni yokuqala yokungena kweMelika eMpini Yezwe II, amasosha ase-U.S. amisa imishini ye-radar yokuxwayisa kusenesikhathi ogwini ngenxa yokukhathazeka ngokuzivikela kwezwe ngokumelene namabhomu esitha. Ngemva kokuhlaselwa ngokuzumayo kwePearl Harbor, izikhulu zazikhathazekile ngokuthi izitha zingase zikhethe ukuhlasela iPanama Canal  <response>: ikakhulukazi ngenxa yokubaluleka kwayo ekuxhumaniseni imizila yezempi neyokuthutha ye-Atlantic nePacific. Njengoba umnyango osentshonalanga oya eCanal Zone wawungenayo indawo eseduze eyayingasetshenziswa njengezindawo zemisebe, umnyango wawuvikelwe imikhumbi eyayiphethe imisebe. Ngo-1942, imicabango yashintsha isuka ekuvikeleni emoyeni okuzenzakalelayo yaya ekuhlaseleni kwamabutho ahlangene, futhi abaholi bezempi beMpi Yezindiza bagcizelela isidingo sezindiza ezihambayo ezihamba ibanga elide phakathi nezimpi zabo ePacific. Nokho, imishini ye-radar yaseMelika ngaleso sikhathi yayinesilinganiso esiphezulu semvamisa yama-megacycle angu-200, okwakungayenzi nje kuphela ibe sengozini yokuhlaselwa ngokuzumayo yizindiza ezindiza kancane kodwa futhi yayinkulu kakhulu futhi kunzima ukuyinciphisa. 