32
3.OPERATIONS
"DISC." for easy identification of
bottom material
In general, the tail width in the bottom echo
changes as follows according to the
particular material of the bottom:
Type of bottom
Tail size
Rock
Long
Gravel
↑
Sand
↑
Mud
Short
Thus, changes in the hardness of the
bottom can be identified from changes in
the tail width of the bottom echo.
In the bottom discrimination display mode,
since echo of the bottom tail is displayed
directly below standard expanded bottom
echo, changes in tail width can better be
i d e n t i f i e d t h a n w i t h a c o n v e n t i o n a l
fishfinder.
"DISC."
Displays bottom discrimination under the "BOTTOM LOCK" display.
Changing the bottom expand mode (LOCK/DISC.)
1
Display the main menu by pressing the
and
keys together.
2
Move control to "DISPLAY" by pressing the
or
key, and
then move control to the DISPLAY SETTING submenu by
pressing the
key.
3
Move control to "BTM. EXP. MODE" by pressing the
or
key.
4
Move control to either "LOCK" or "DISC." by pressing the
or
key.
5
Press the
MARK
key to return to the main menu.
6
Press the
GRAPH
key to return to the fishfinding display.
How to use the bottom expand mode
In the bottom expand mode, "LOCK" or "DISC." can be used as its
submodes in the specified bottom expand range (1 to 50 m) during
fishfinding display.
"LOCK"
Expands display with the bottom as its basis.
Main menu
DISPLAY
DISPLAY SETTING
BTM. EXP. MODE
MARK RETURN TO MAIN MENU
DISPLAY SETTING
LOCK DISC
LOG LINEAR
1／3
1／2
BTM TRACK
VRM
AUTO
2
5
10
20
50
OFF
ON
OFF
ON
OFF
▲▲
GRAPH CLOSE MENU
▲
▲
ZOOM MODE
BTM. EXP. MODE
A - S C O P E
ZOOM AREA
SPLIT DISPLAY
V
R
M
COLOR SAMPLE
SCALE POSITION
FINE SCALE
MAIN MENU
DEPTH/TEMP
STD. 1 2 3
STD. 1 2 3
10
5
OFF AUTO RANGE
AUTO SHIFT
PRESET
▲▲
GOTO SUB MENU
GRAPH
▲
▲
▲
▲
▲
▲
▲
▲
COLOR MODE
BACK COLOR
USER COLOR
D I S P L A Y
G R A P H
A L A R M
STD. RANGE
ZOOM RANGE
BOTTOM RANGE
AUTO MODE
CLOSE MENU
Zoom area
R
Zoom area
