4-21 
 
SN Value: High 
・Function・  When SN is selected by the mode 
selection  of the echo graph setting, it 
sets.   
When the S/N  value of the echo is 
higher than that of the set level, it 
displays  by the permeability 0%(no 
penetration). Refer to Fig. 4.2.3. 
  Operation    Standard Menu:  Current screen 
setting menu/SN value: High 0 dB 
Selection Frame Menu: Echo graph 
setting menu/ SN value: High 0 dB 
 
 
 
  Fig. 4.2.3 Echo Table by SN Mode 
SN Value: Low 
・Function・  When the S/N  value of the echo is lower than that of the set level, it displays  by the 
permeability 100%(all penetration). Refer to Fig. 4.2.3. 
  Operation    Standard Menu: Current screen setting menu/SN value: Low -12 dB 
Selection Frame Menu: Echo graph setting menu/ SN value: Low -12 dB 
 
  Setting condition of SN value    SN High>Medium S>N Value>SN Low 
It approaches the background color of the permeability 100% by the S/N value low. Refer to 
Fig. 4.2.3. 
Setting value: It is possible to set freely in every 1dB step within the range from 0 to -120 dB. 
Setting condition: SN Value High > SN Value Low (Standard setting: High -0dB/Low -12dB) 
Display Color 
・Function・  It is possible to select it from A-D by the menu. Refer to Table 4.2.1.   
[FISH] screen and commonness: A) 16 color standard B) 16 color dark color system C) 16 
light color system D) Eight colors     
  Operation    Standard Menu: Current screen setting menu/Display color: A B C D 
Selection Frame Menu: Echo graph setting menu/Display color: A B C D 
 
Table 4.2.1 Color Sample and Color Arrangement 
 
  Weak    Signal Strength      Strong 
No  1  2  3  4  5  6  7  8  9  10  11  12  13  14  15 
  A  Dark 
Blue 
Blue  Light 
Blue 
Dark 
Sky 
Blue 
Sky 
Blue 
Grn  Light 
Grn 
Pea 
Grn 
Yellow  Light 
Org 
Org  Dark 
Org 
Red  Brwn  Dark 
Brwn 
B  Dark 
Blue 
Blue  Dark 
Grn 
Grn  Light 
Grn 
Pea 
Grn 
Yellow  Light 
Org 
Org  Dark 
Org 
Red  Dark 
Red 
Light 
Brwn 
Brwn  Dark 
Brwn 
C  Light 
Sky 
Blue 
Sky 
Blue 
Light 
Blue 
Blue  Dark 
Blue 
Pea 
Grn 
Yellow  Light 
Org 
Org  Dark 
Org 
Red  Light 
Brwn 
Brwn  Dark 
Brwn 
Pink 
D  Back 
-ground 
Sky Blue  Blue  Pea Grn  Yellow  Org  Red  Brwn 
 
Background Color 
・Function・  The background color in the echo graph is selected.    It selects from four colors.   
The standard is set to the same background color as other background colors. 
Operation    Standard Menu: Current screen setting menu/Background color: Black  Navy Blue Gray  
White 
Selection Frame Menu: Echo graph setting  menu/ Background color: Black Navy Blue 
Gray White 
 
Permeability:  0      100  % 
S/N Value:  High      Low 
Color 
Week