Lowrance 250c 操作指南

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You will navigate a little easier if you understand the basics of how the 

iWAY scans the sky to show you where you are and where you are go-

ing. 
You will use the iWAY's touch screen to enter commands and control 
its functions. As long as there is no interference 

− and the unit is locked 

on to a satellite signal 

− it will display your location on a moving map 

and help guide you to your destination. A built-in speaker allows you to 

hear verbal turn-by-turn driving instructions and listen to MP3 music 

files. 
The internal antenna tunes in to a couple of dozen GPS (Global Posi-

tioning System) and WAAS satellites circling the earth. The unit lis-

tens to signals from as many satellites as it can "see" above the horizon 

then computes its location in relation to those satellites. The iWAY 

plots your position on the map display on-screen. The iWAY's 2 giga-

byte SD Card contains highly detailed road and highway mapping data 

either for the U.S. or Western Europe, depending on which version of 

the unit you have purchased.  
If you have purchased the U.S. version of the iWAY the SD card should 

contain mapping data for Hawaii, Alaska, the 48 contiguous United 

States and most of Canada. 
If you have purchased the European version of the iWAY the SD card 

should contain mapping data for Andorra, Austria, Belgium, Channel 

Islands, Denmark, Germany, Greece, England, Finland, France, Gi-

braltar, Ireland, Isle Of Man, Italy, Liechtenstein, Luxembourg, 

Monaco, Netherlands, Northern Ireland, Norway, Portugal, San Mar-

ino, Scotland, Spain, Sweden, Switzerland, Vatican and Wales. 
CAUTION: 

For the system to work the unit must have a clear view of the satellites. 

Unlike radio or television signals GPS works at very high frequencies. 

These signals can be easily blocked by trees, buildings, an automobile 

roof, even your body. If you would like to know more about GPS and its 

companion system WAAS, visit our web site and check out the GPS 

Product Guide section (www.lowrance.com/Support/gps.asp). It includes 

a GPS tutorial, frequently asked questions and a glossary.