4. SLANT MODE
4-18
4.12.3
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 4.12.1.
2. On the slant display, use the trackball to 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.
4.12.4
Target lock menu description
Target lock functions not previously mentioned are described below.
Tilt Interlock
Provides automatic change of tilt angle and range or tilt angle in target lock. Setting
range: [OFF] (no automatic change), [Tilt ] (tilt angle), [Tilt & Range] (tilt angle and
range)
Mark Inter-
lock
Turns numeric/graphic data displays On/Off in target lock. [OFF] turns off both the
estimate mark 1, 2 histogram and data display. [Estimate Mark] enables the esti-
mate mark 1, 2 histogram. [Est & Fish Info] enables the both the estimate mark 1,
2 histogram and data display.
Tracking Data
During the slant mode, H/S display is adopted for all functions.
Threshold
Selects the minimum signal level to use in target lock tracking. The setting range
is 1 to 30. Target lock tracks a target whose signal level is greater than set here.
Bottom
Threshold
When a target is judged as a bottom echo, raise this setting to differentiate bottom
from target. The setting range is 0 to 5.
Target Speed
Limit
Sets maximum fish speed to track. The setting range is 1kn to 15kn.
Smoothing
Sets smoothing rate for fish speed data. The higher the figure, the smoother the
position of the target lock target. Avoid oversmoothing, to prevent delay in tracking
when own ship or target moves suddenly. The setting range is 0.0 to 1.0.
Target SPD
Update
Sets the interval at which fish speed data is updated. The intervals are 15, 30, 45
and 60 seconds.
Target Lock
Window
Selects the size of target lock detection area; normal, large, largest. (The area is
not indicated on the screen.)
Dimension
Setup
Sets dimension constant for calculation of weight (ton) of school of fish from the
dimension of the school of fish.
Volume Setup
Sets volume constant for calculation of weight (ton) of school of fish volume.
Depth
A
B
C
D
E
Summary of Contents for FSV85MK2
Page 12: ...SYSTEM CONFIGURATION xii This page is intentionally left blank ...
Page 74: ...2 HORIZONTAL MODE 2 44 This page is intentionally left blank ...
Page 128: ...4 SLANT MODE 4 36 This page is intentionally left blank ...
Page 132: ...5 NUMERIC GRAPHIC DATA DISPLAY 5 4 This page is intentionally left blank ...
Page 188: ...9 MAINTENANCE 9 24 This page is intentionally left blank ...
Page 199: ......