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Displaying the bottom hardness (BH value) on a graph (DEPTH & BH)
The relationship between water depth and the hardness of the bottom
can be displayed on a graph.
This graph can be displayed using the following procedure:
Display the main menu by pressing the
Move control to "GRAPH" by pressing the
then move control to the GRAPH SETTING submenu by pressing
the
key.
Move control to "TYPE" by pressing the
Move control to "DEPTH/BH" by pressing the
Press the
Press the
The hardness of the bottom (BH) is displayed in white, and water
depth, in red.
In general, the tail width in the bottom echo depends on the
hardness of the bottom, as shown below. Bottom hardness is
automatically analyzed and displayed as a BH level from 1 to 8 to
provide a measure of bottom hardness.
Type of bottom material
Rock
Gravel
Sand
Mud
See page 10 for the bottom discrimination mode.
Dual-display procedure: Proceed from the main menu to
"DISPLAY", "BTM. EXP. MODE", and "DISC.", in that order. See
page 32.
36 3.OPERATIONS
key to return to the main menu.
MARK
key to return to the fishfinding display.
GRAPH
Tail size
Long
↑
↑
Short
and
keys together.
or
key, and
or
key.
or
key.
BH level
8
↑
↑
1
Dual display in bottom
discrimination mode
Main menu
GRAPH SETTING
GRAPH
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