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From English - German Ding/FreeDict dictionary ver. 1.9-fd1 : [ freedict:eng-deu ]
navigational aid /nˌavɪɡˈeɪʃənəl ˈeɪd/ Navigationshilfe[aviat.] [naut.] see: aid, aids, walking aid, walker, disability aid, disabled aid, search aid, teaching aid, learning aid, instructional aid, medical aid, visual aid, homing aid