Lowrance 540c baja 操作ガイド

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3. To change distance settings, scroll 

↓

 

↑

 to select the desired category, 

then press 

→  |

 to activate the distance dialog box. Use 

↑  ↓ to 

change the first character, then press 

→ to the next character and re-

peat until the name is correct. 
4. When your adjustments are finished, return to the last page dis-

played by repeatedly pressing 

. 

Anchor Alarm - The anchor alarm may be triggered even when you 

are sitting still. This typically happens when using small (less than 

.05 mile) anchor alarm ranges. 
Arrival Alarm - If you set the arrival alarm's distance to a small 

number and you run a route (see the Navigate Routes segment), 

this unit may not show navigation data to the next waypoint, once 

you arrive at the first one. You may not be able to come close 

enough to the first waypoint to trip the arrival alarm. 

To lock on to the satellites, the GPS receiver needs to know its current 

position, UTC time and date. (Elevation [altitude] is also used in the 

equation, 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. (If the time 

and/or date are incorrect, you can set them using the "Set Local Time" 

menu.) 
The unit begins searching for the satellites using the above data that it 

acquired the last time it was turned on. This probably was at the fac-

tory. Since it's almost certain that you're not at our factory, it's proba-

bly looking for the wrong satellites. 
If it doesn't find the satellites it's looking for after approximately one 

minute, it switches to Auto Search. The receiver looks for any satellite 

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

shrunk significantly from the early days of GPS. 
Once the unit locks on to the satellites, it should take less than a minute 

to find your position the next time it's turned on, as long as you are ap-

proximately 100 miles from the last location it was used.