Furuno FSV-75, Operator'S Manual

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2. SLANT MODE
2-22
2.12.2 Fish mode
The automatic echo target lock function automatically tracks the operator-selected
school of fish. When [2 Tilt Interlock] (located in the [8 Target Lock] menu (see previ-
ous page) is set to [Tilt & Range], and the tracked school of fish goes out of the zone
in the range direction, the range and tilt are automatically controlled according to the
position of the school of fish.
1. Select [Fish] in the procedure in section 2.12.1.
2. Select the school of fish to track.
3. Press the
TARGET LOCK key.
The target lock mark (red) is put on the school of fish selected at step 2. The color
of the target lock mark (with vector) changes to white when the school of fish is
captured by target lock. The vector shows the speed and direction of movement
of the school of fish. The tip of the vector is the estimated position of the school of
fish when the vector time elapses.
If the target is lost, the target lock mark changes to red color and the tracking
mode changes to position mode (see next section) at that position. When the so-
nar detects and tracks the target again, the Fish mode is restored.
4. To disable the target lock, press the TARGET LOCK key.
2.12.3 Target mark mode
This mode tracks a stationary position (such as a reef) using position data fed from a
navigator.
1. Select [Target Mark] in the procedure in section 2.12.1.
2. Select the location to track.
3. Press the
TARGET LOCK key.
Tilt, range and vertical bearing are automatically adjusted to track the location. Us-
ing the figure above as an example, the target lock mark is placed on location E.
Then, the equipment remembers the location of E and automatically changes the
tilt angle as the ship moves from position A through D. As long as the school of
fish E is stationary its echo is kept displayed on the screen.
4. To disable the target lock, press the TARGET LOCK key.
Target lock mark
Track of school of fish
(Turned ON or OFF on
Mark Display menu.)
TARGET LOCK DATA
C
256° (Course)
S
12.3kn (Target speed)
2975m (Horizontal range)
153m (Depth)
Vector
(Heading data required)
Depth
A B C D
E