Lowrance lms-522c igps 操作指南

54 

If you want to change the sensitivity in Manual Mode, first turn off 
Auto Sensitivity: from the Sonar Page, press 

|

↓ to 

|

|

↑ to 

|

. Press 

↓ or ↑ to pick a different sen-

sitivity setting. When it's set at the desired level, press 

. 

While you are experimenting and learning, it's possible to scramble 

the settings so that the sonar picture disappears from your screen. 

If  that  happens,  remember  that  it's  easy  to  switch  back  to  full 

automatic operation by simply restoring the factory auto settings.  

 

1. Press 

|

|

↓ to 

|

|

↓ to 

|

. 

2. The unit asks if you want to reset all the options. Press 

← to 

|

. All options are reset, and the unit reverts back to the Map 

Page at the 4000 mile zoom range. (Any recorded sonar logs or GPS 

data will be unchanged.) 

Fish Symbols vs. Full Sonar Chart 
You may have noticed in the quick reference that we used fish arches 

in full sonar chart mode for our example, and not the popular Fish 
I.D.

™ fish symbol feature. Here's why. 

Fish I.D. is an easier way for a sonar novice to recognize a fishy signal 
return when he sees it. However, locating fish by symbol only has some 

limitations. 
Your sonar unit's microprocessor is remarkably powerful, but it can be 
fooled. Some of the echoes calculated to be fish could be tree limbs or tur-
tles!  To see what's under your boat in maximum detail, we recommend 
you turn off Fish I.D. and begin learning to interpret fish arches. 
Fish I.D. is most handy when you're in another part of the boat or per-

forming some task that prevents you from watching the sonar screen. 

Then, you can turn on Fish I.D. and the audible fish alarm. When that 

lunker swims under your boat, you'll hear it! 
Fish I.D. can also be useful when you want to screen out some of the 

sonar detail gathered by your unit. For example, in one case fisherman 

in San Francisco Bay saw clouds of clutter in the water but no fish 

arches. When a down rigger was pulled up, it brought up several small 

jellyfish. The fisherman switched their sonar to Fish I.D., which 

screened out the schools of jellyfish and clearly showed the game fish 

there as fish symbols.