Target Mark Mode; Target Lock Menu Description - Furuno FSV-25S Operator's Manual

2.11.3

Target mark mode

This mode tracks a stationary position (such as a reef) using position data fed from a
navigator.
Depth
1. Select [Target Mark] in the procedure in section 2.11.1.
2. On the horizontal 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.
2.11.4

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 options: [OFF], [Tilt], [Tittering])
[Mark Interlock]: Turns numeric/graphic data displays ON/OFF in target lock. (See
section 4.1.) [Off] disables the histogram display and fish information for estimate
mark 1. [Estimate Mark] displays the histogram display for estimate mark 1. [Est &
Fish Info] displays the histogram display and fish information for estimate mark 1.
[Tracking Data]: Selects which target lock tracking data to use, horizontal or both hor-
izontal and vertical.
[Threshold]: Selects the minimum signal level to use in target lock tracking. The set-
ting 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 1 kn to
15 kn.
[Smoothing]: Sets smoothing rate for fish speed data. The higher the setting, 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 in-
tervals 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.)
A B
2. HORIZONTAL MODE
C D
E
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