| 
  | 5.1.2  | Zoom Full page  | 28  | 
  | 
  | 5.1.3  | Chart/Fish  | 29  | 
  | 5.2  | GAIN MODE  | 29  | |
  | 
  | 5.2.0  | Auto Mode  | 29  | 
  | 
  | 5.2.1  | Manual Mode  | 29  | 
  | 5.3  | RANGE MENU  | 29  | |
  | 
  | 5.3.0  | Range Mode  | 29  | 
  | 
  | 5.3.1  | Depth  | 30  | 
  | 
  | 5.3.2  | Shift  | 30  | 
  | 5.4  | INTERFERENCE REJECTION  | 30  | |
  | 5.5  | SENSITIVITY MENU  | 31  | |
  | 
  | 5.5.0  | Gain  | 31  | 
  | 
  | 5.5.1 STC (Sensitivity Time Control)  | 31  | |
  | 
  | 5.5.2  | Surface Noise Filter  | 32  | 
  | 5.6  | DISPLAY SETUP  | 33  | |
  | 
  | 5.6.0  | Color Settings  | 33  | 
  | 
  | 5.6.1  | Scrolling Speed  | 33  | 
  | 
  | 5.6.2  | White Line  | 33  | 
  | 
  | 5.6.3  | Fish Symbols  | 33  | 
  | 
  | 5.6.4  | 33  | |
  | 
  | 5.6.5  | Water Temperature  | 34  | 
  | 5.7  | TRANSDUCER SETUP  | 34  | |
  | 
  | 5.7.0  | Keel Offset  | 34  | 
  | 
  | 5.7.1  | Calibrate Water Speed  | 34  | 
  | 
  | 5.7.2  | Calibrate Water Temp  | 34  | 
  | 
  | 5.7.3  | Calibrate Aux Temp  | 34  | 
  | 
  | 5.7.4  | Set Defaults  | 34  | 
  | 5.8  | ALARMS  | 34  | |
  | 
  | 5.8.0  | Shallow Water  | 35  | 
  | 
  | 5.8.1  | Depth Water  | 35  | 
  | 
  | 5.8.2  | Fish  | 35  | 
  | 
  | 5.8.3  | Temperature Upper  | 35  | 
  | 
  | 5.8.4  | Temperature Lower  | 35  | 
  | 
  | 5.8.5  | Temperature Rate  | 35  | 
  | 5.9  | SAVE SETTINGS TO USER   | 35  | |
  | 5.10 LOAD SETTINGS FROM USER   | 36  | ||
  | 5.11  | RESTORE CURRENT PRESET DEFAULTS  | 36  | |
6.  | FF520 SPECIFICATIONS  | 37  | ||
7.  | TIPS OF OPERATIONS FAQ | 39  | ||
INDEX | 
  | 
  | ......................................................................................................  | 43  | 
Page 6  | FF520  |