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Add a Fada:  [á] [é] [í] [ó] [ú]
navigational
Usage
  1. navigational aids = aisíní loingseoireachta
  2. radio navigational aid apparatus, radar apparatus and radio remote control apparatus = gairis chúnta radaloingseoireachta, gairis rada-bhraith, gairis rada-thóraíochta agus gairis chianrialaithe raidió
  3. radio navigational aids, other than direction-finders (including requirements relating to their position and method of fitting) = raidió-chabhracha loingseoireachta, seachas treo-aimseoirí (lena n-áirítear ceanglais a bhaineann lena suíomh agus le modh a bhfeistithe)