Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
nāvĭgātĭo, ōnis, f. [navigo], a sailing, navigation: ex tuis litteris cognovi cursūs navigationum tuarum, Cic. Fam. 13, 68, 1: in portum ex longā navigatione venire, id. Sen. 19, 71: prima navigatio, id. Q. Fr. 2, 6, 3: navigationi se committere, id. Fam. 16, 4, 1: celeri navigatione properare, Tac. H. 2, 81; 4, 49: maris, id. ib. 2, 53: diei navigatione distare, a day’s sail, Plin. 2, 75, 77, § 187: Aegyptia, id. 24, 6, 19, § 28.