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2. HORIZONTAL MODE
2-21
2.12.4 Echo mode
The echo mode tracks a fish school, either automatically or manually. The default setting
is automatic, and you can choose automatic or manual with “LOCK MODE” in the HORZ
menu.
Automatic echo tracking mode
The automatic echo target lock function automatically tracks a fish school appearing in the
operator-chosen target lock area. If the tracked fish school goes out of the area in the
range direction, tracking is suspended until it or a new fish school comes into the area.
To use the automatic echo tracking mode:
1. Choose ECHO following the procedure in paragraph 2.12.1.
2. Set LOCK MODE to AUTO on the HORZ menu.
3. Press the [TARGET] key. The dialog box below appears at the screen center, the
message “ECHO LOCK” appears for three seconds at the top of the screen, the target
lock area appears in the current train area and the target lock indicator appears at the
right-hand side of the screen.
TARGET LOCK AREA.
: INSIDE
: OUTSIDE
4. Use the [SECTOR] and [TRAIN] controls and the Omnipad to set the detection area.
Do not include bottom echoes in the zone, so that target lock will not be activated by
bottom echoes.
When a target of red or reddish-brown color is detected in the target lock area, the
target lock indicator blinks and a buzzer sounds to call the operator’s attention.
NAV
DATA
Target lock
indicator
Outer limit
Inner limit
Target lock area