How To Measure Depth; Menu Operating Procedure - Furuno FCV-288 Operator's Manual

1. OPERATION
[Cruising]: This mode clearly displays
stronger echoes (for example, bottom)
and suppresses weak echoes. Use this
mode for general cruising. "G:AC" is
shown at the top left corner on the screen.
[Off]: For manual gain adjustment. The
display shows, "G:X.X" (X.X=gain setting)
when manual gain is active.
If you selected [Fishing] or [Cruising], you
can apply an offset to the gain, at step 3.
To apply no offset, go to step 4. For [Off],
do steps 4 and 5.
3. Press or (setting range: -5 to +5) to
apply an offset. Press
offset; to raise the offset.
4. Press the ENTER key. The new gain set-
ting is also applied to past echoes.
5. For manual adjustment, rotate the GAIN
control to set the gain (0.0 to 10).
Individual Gain Setting
The gain of the low and high frequencies can
be set individually on the dual frequency dis-
play (paragraph 1.4.2). Turn off [Auto Gain]
(section 1.6) to enable this function. Press
to select the LF or to select HF, then adjust
the Gain control. The setting range for either
frequency is 0.0 to 10.
to decrease the
6
1.7 How to Measure
Depth
The VRM (Variable Range Marker) functions
to measure the depth to schools of fish, etc.
This function is inoperative when a NAV data
display is active.
1. Use or to place the VRM on the ob-
ject to measure depth.
2. Read the VRM depth just above the VRM.
AUTO_R
VRM
38.7
ft
1.8 Menu Operating
Procedure
Your fish finder has five main menus: Sound-
er, Display, Alarm, Data, and System. Below
is the basic menu operating procedure.
1. Press the MENU ESC key to open the
menu.
Currently selected menu
Cursor
(yellow)
Main menu
Names of sub
menus appear
when selected.
See Chapter 2.
Operating
guidance
LF L:AF x1
0
VRM Depth
20
32.5
40
60
Sub menu