This is why it's much faster if you're turning the unit on near the same place where it was turned off. When you let it sit for a long time or when you've moved very far since the last time it was used, that predictive algorithm doesn't help, so it has to check each satellite and figure the position from scratch.
So if you fire it up again the very next day from the same spot, it will lock on faster because it has a rough idea of which satellites it should be looking for and where it is. The systems use predictive positioning based on an internal clock. This resets all your location settings and user preferences. Continue to hold the screen until the 'Do you want to erase all user data' prompt appears. Press and hold the bottom-right corner of the screen while powering the unit on.
Essentially, the unit doesn't have to "remember" a rough position, because it always "knows" the rough position from cell tower signals.Īt least, that's my theory for why cell phones lock on faster based on my understanding of how the predictive algorithms are used to speed GPS acquisition in Garmin units. Try a hard reset with these steps: Power the unit off. This is why it's much faster if you're turning the unit on near the same place where it was turned off.Ĭell phones can get rough location from the cell towers (within a couple km), which, if combined with good good enough programming, can be used to approximate the spot and speed GPS acquisition. Click to expand.The systems use predictive positioning based on an internal clock.
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