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Navigational TransitIn navigation and position fixing, a transit occurs when a navigator observes two fixed reference points that are in line with the navigator. This creates a position line. The intersection of two position lines tells the navigator his or her location. Sensitive reference points for transits are far apart; the closer they are, the more difficult it is to tell if they are lined up. Transits usually rely on visual reference points. Often that is their downfall; good visual conditions are needed to make use of them.
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