Patent ID: 8111190

Claim:
A navigation apparatus, comprising: an acquisition unit that acquires a plurality of orbit data by demodulating each of the orbit data of a plurality of satellites received from the satellites; a current position locating unit that computationally determines a plurality of distance data from the plurality of satellites according to arrival times of, or times of acquiring the respective plurality of orbit data or some other data by the acquisition unit, and pinpoints the current position of its own according to the plurality of orbit data or the plurality of distance data; an acquisition progress level display unit that monitors an acquisition progress level until completely acquiring the plurality of orbit data sufficient for pinpointing the position and displays a current data acquisition ratio relative to the plurality of orbit data sufficient for pinpointing the position in a display section using a level mark of a predetermined bar display; and a remaining effective time display unit that counts the remaining effective time of the orbit data used for pinpointing the current geographical position and displays the remaining effective time in the display section in a predetermined display format, wherein the remaining effective time display unit displays the bar display of the level mark, providing it with a gradation of a color that fades as a function of the decrease of the remaining effective time.