Furuno GP-3700F, Operator'S Manual

Page: 170 / 224

11. ECHO SOUNDER
11-22
11.15.4 How to select the unit for fish length
1. Press the MENU key to open the main menu.
2. Select [0. SYSTEM SETTING].
3. Select [8. ECHO SOUNDER INITIAL SETTING].
4. Select [3. ACCU-FISH SETTING].
5. Select [FISH LENGTH UNIT].
6. Select [cm] or [inch].
7. Press the
DISP key to close the menu.
11.16 Bottom Discrimination Display
The bottom discrimination (seabed composition) display analyzes the bottom echo to
categorize bottom hardness in one of four types (rocks, gravel, sand, mud) and shows
the results in a colorful graphic display. A transducer or triducer that supports the bot-
tom discrimination display is required. There are two bottom discrimination displays:
[GRAPHIC] and [DETAILS].
[GRAPHIC]: The most probable material on the bottom is indicated.
[DETAILS]: The probability of the bottom material is graphically indicated in propor-
tion.
Bottom legend
Probability bar*
Bottom discrimination
display column
Mud
Gravel
Sand
Rock
*: Degree of trust for bottom discrimination
display(Green: Normal; Yellow: Caution;
Background color: Abnormal)
Graph example
Bottom legend
Probability bar
Bottom discrimination
display column
Mud
Sand
Gravel
Rock
Mud probability (approx. 25%)
Sand probability (approx. 25%)
Rock probability (approx. 50%)