Manual Fish Finder Operation; How To Select A Display Range; How To Shift The Range - Furuno GP-1670F Operator's Manual

7.7

Manual Fish Finder Operation

Use the manual operation to see schools of fish and the bottom echo with a fixed gain
setting.
The gain, range and range shift functions let you select the depth you can see on the
screen. The basic range provides a "window" into the water column and range shift
moves the" window" to the depth that you select.
To select the manual mode, open the RotoKey menu then select [Auto Mode] and
[Manual].
7.7.1

How to select a display range

Range can be selected automatically or manually. Open the RotoKey menu then se-
lect [Auto Range] and [Auto] or [Manual].
[Auto]: The range is automatically adjusted to always display the bottom echo at the
lower of the screen. When rotate the RotoKey
Range mode. Can't change Rage." appears.
[Manual]: Change the range with the RotoKey
the range and counterclockwise to decrease the range.
Unit
1
m
10
5
ft 15 30
fm 3
HR 3 8
pb
3 5
7.7.2

How to shift the range

The basic range and range shift functions let you select the depth you can see on the
screen. This function is not available when the auto range mode is on or the bottom
discrimination feature is active.
Window can be
shifted up and
down to select
starting depth.
Basic Range
2 3 4 5 6
20
40 80 150
60 120 200 400 1000
5 10 20 40 80
15 30 50 100
10 30 50 100
Display
TM
in the auto mode, the message "Auto
TM
. Turn the key clockwise to increase
7 8
300 500
1500
150 300
200 300
HR=Hiro (Japanese unit of depth)
300
200
pb=passi/braza
7. FISH FINDER OPERATIONS
7-9