Lowrance 250c 操作ガイド

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These upgrades make the unit perform better or introduce a new fea-

ture or function. You can find out what software version is running in 

your unit by using the Device Information command. From the Options 

Menu, choose 

. 

Complete information and instructions for installing an update will be 

available on the update's page at the Lowrance web site.  

GPS Status 
The GPS Status command opens a GPS Status Screen which provides 

information on the satellite signals that your iWAY is monitoring to 

determine your position. You can access the GPS Status Screen by 

choosing 

 from the Options Menu. A screen like the one in 

the following image will appear. 

 

Three buttons along the left side of the GPS screen indicate the quality 

of the units position lock. The button that's selected indicates your cur-

rent position lock. If none of them is selected your current position has 

not been established. 

2D means the iWAY has achieved a lock on your current position on a 
map. A 2D lock does not include your altitude. The iWAY must receive 

reliable signals from 3 satellites to establish a 2D lock. 

3D means the iWAY has achieved a more reliable lock, including not 

only your coordinate location but also your altitude (or elevation). The 

iWAY must receive reliable signals from 4 satellites to establish a 3D 

lock.