Manual Lowrance GlobalMap 1600 (page 20 of 92) (English)

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FINDING YOUR POSITION

Auto Search

To lock onto the satellites, the GPS receiver needs to know it’s current

position, UTC time, and date. (Elevation (altitude) is also used in the equa-

tion, but it’s rarely required to determine a position.) It needs this data so

that it can calculate which satellites should be in view. It then searches for

only those satellites. When your GPS receiver is turned on for the first

time, it doesn’t know what your position or elevation (altitude) is. It does

know the current UTC time and date since these were programmed into it

at the factory and an internal clock keeps the time while the unit is turned

off. It begins searching for the satellites using the above data that it ac-

quired the last time it was turned on. This probably was at the factory.

Since it’s almost certain that you’re not at our factory, it’s probably looking

for the wrong satellites. If it doesn’t find the satellites it’s looking for after

five minutes, it switches to Auto Search. The receiver looks for any satel-

lite in the sky. Due to advanced technology, the auto search time has

shrunk to about five minutes, so the longest time you should ever have to

wait is ten minutes from the time you turn the unit on until it locks onto the

satellites and shows a position. Once the unit locks onto the satellites, it

should take less than a minute to find your position the next time it’s turned

on, provided you haven’t moved more than approximately 100 miles from

the last location it was used.

Manual Initialization

If you don’t want to wait for the Auto Search, then you may be able to

speed up the initialization process by using the manual initialization fea-

ture. Using this feature tells the unit it’s approximate position. Once it knows

it’s location, it determines exactly which satellites should be in view and

starts looking only for those satellites.

To manually initialize the unit, press the MENU

key. Now press the down arrow key until the “GPS

SETUP” label is highlighted. Press the right ar-

row key. The “INITIALIZE GPS” label is high-

lighted. Press the right arrow key again. A screen

similar to the one at right appears. Use the arrow

keys to move the crosshairs to your approximate

location on the map. You can use the ZIN and

ZOUT keys to enlarge the map which makes it

easier and faster to find your location. The box at the top of the screen

shows the latitude and longitude of the cursor position, along with the

distance and bearing from the last known position. Once you have the

crosshairs on your location, press the ENT key. The unit returns to the

satellite status screen.

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Lowrance GlobalMap 1600 Manual

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