The Collaborative International Dictionary of English v.0.48:

navigational \navigational\ adj.
   of or pertaining to navigation; used in navigation; as,
   navigational aids.
   [WordNet 1.5]

WordNet (r) 3.0 (2006):

navigational
    adj 1: of or relating to navigation; "navigational aids"

Moby Thesaurus II by Grady Ward, 1.0:

22 Moby Thesaurus words for "navigational":
   cartographic, chorographic, geodetic, geographic, locational,
   marine, maritime, nautical, naval, ocean-going, oceanic, pelagic,
   positional, regional, salty, seafaring, seamanlike, seamanly,
   situal, situational, topographic, water-borne