Furuno GP-1870F vi

TABLE OF CONTENTS

6.3 3D Display..................................................................................................................6-6

6.3.1 3D display description ....................................................................................6-6

6.3.2 How to tilt and rotate the 3D display .............................................................. 6-7

6.3.3 How to make the 3D view clearer .................................................................. 6-7

6.4 Satellite Photo Overlay...............................................................................................6-8

7. FISH FINDER OPERATIONS ................................................................................7-1

7.1 How the Fish Finder Works........................................................................................7-1

7.2 Fish Finder Display ....................................................................................................7-2

7.3 How to Activate the Fish Finder................................................................................. 7-3

7.4 How to Select a Display............................................................................................. 7-3

7.4.1 How to select a single frequency or dual frequency....................................... 7-3

7.4.2 How to select a zoom display......................................................................... 7-4

7.4.3 A-scope display ..............................................................................................7-5

7.4.4 Bottom discrimination display......................................................................... 7-6

7.5 Automatic Fish Finder................................................................................................ 7-8

7.5.1 How the automatic fish finder works .............................................................. 7-8

7.5.2 How to select an automatic fish finder mode ................................................. 7-8

7.5.3 How to adjust the gain in the auto mode ........................................................7-8

7.6 Manual Fish Finder Operation....................................................................................7-9

7.6.1 How to select a display range ........................................................................7-9

7.6.2 How to shift the range ....................................................................................7-9

7.6.3 How to adjust the gain.................................................................................. 7-10

7.6.4 How to reduce clutter ...................................................................................7-10

7.7 Picture Advance Speed............................................................................................7-11

7.8 How to Reduce Interference ....................................................................................7-12

7.9 How to Erase Weak Echoes ....................................................................................7-12

7.10 How to Measure Depth, Time Between Locations................................................... 7-13

7.11 How to Balance Echo Strength ................................................................................7-13

7.12 White Marker............................................................................................................ 7-14

7.13 White Line ................................................................................................................7-14

7.14 Alarms......................................................................................................................7-14

7.14.1 How to set an alarm .....................................................................................7-15

7.14.2 How to select the echo signal level that triggers the fish alarm ................... 7-15

7.15 ACCU-FISHTM .........................................................................................................7-16

7.15.1 Considerations for ACCU-FISHTM ............................................................... 7-16

7.15.2 How to activate ACCU-FISHTM, select display information ......................... 7-17

7.15.3 Fish size correction ......................................................................................7-17

7.16 Water Temperature Graph....................................................................................... 7-18

7.17 FISH FINDER Menu.................................................................................................7-19

7.18 Interpreting the Display ............................................................................................7-22

8. ALARMS ................................................................................................................8-1

8.1 ALARMS Menu ..........................................................................................................8-1

8.2 Audio Alarm Conditions..............................................................................................8-2

8.3 Arrival Alarm...............................................................................................................8-2

8.4 XTE Alarm..................................................................................................................8-3

8.5 Temperature Alarm.................................................................................................... 8-3

8.6 Shear Alarm............................................................................................................... 8-4

8.7 Depth Alarm............................................................................................................... 8-4

8.8 Anchor Alarm .............................................................................................................8-5

8.9 Trip Alarm...................................................................................................................8-5

8.10 Speed Alarm ..............................................................................................................8-5

8.11 Fuel Tank Alarm......................................................................................................... 8-6

8.12 Water Tank Alarm ......................................................................................................8-6

8.13 Black Water Tank Alarm ............................................................................................8-6