2-26
2.20 Application Example
The figure below shows a typical sonar mode application.
Sonar (Horizontal) Mode
PURSE SEINING
BOTTOM TRAWLING
After blinking, remains lit.
1
Power ON.
2
Lower soundome.
1
Power ON.
2
Lower soundome.
Select the proper range and
tilt angle.
3
Observe bottom on the
screen.
Bottom
TRANSDUCER
MODE
RANGE
-
+
TRANSDUCER
-
+
PWR
O
TRANSDUCER
MODE
RANGE
-
+
After blinking, remains lit.
TRANSDUCER
-
+
PWR
O I
TRANSDUCER
TRAIN
MODE
RANGE
-
+
GAIN
0
2
4
6
8
10
3
Search for fish school
with RANGE and TILT
controls.
GAIN
: "3~5"
NOISE LIMITER : "2~4"
TVG(level & time) : "3~5"
TX POWER
: C
Use these settings initially.
"Fine tune" as necessary.
For bottom trawling, sonar is usually used to detect net hangs ahead
rather than to detect fish close to the bottom, since bottom returns
usually mask the weaker fish targets close to the bottom. If the fish
school is dense enough and off the bottom they can be detected by
sonar.
Go to 4 on
next page.
Go to 4 on
next page.
PWR
O
PWR
O
PWR
O
