Tt Symbols And Tt Symbol Attributes; Tt Symbols - Furuno FCR-2107 Operator's Manual

4.7

TT Symbols and TT Symbol Attributes

4.7.1

TT symbols

The symbols used in this equipment comply with IEC 62388.
Item
Automatically
acquired targets
(flashing)
(flashing)
Manually
acquired targets
(flashing)
(flashing)
Acquisition zone
(flashing)
Target selected
for data readout
Reference target
After
acquisition,
changes to
"O" R
Trial maneuver T
(flashing)
TT performance test S
(flashing)
Lost target criteria
Targets not detected in five consecutive scans become "lost targets." A lost target is shown in the display with a red
X superimposed on the TT symbol. The TT symbol disappears after lost target alarm is acknowledged.
If you are in an area where TTs are lost frequently you may want to disable the lost target alarm against TTs by
maximum range or minimum speed. See section 5.11.1 How to enable, disable audio alarm for lost target.
Symbol Status
Initial stage
Steady tracking
CPA alarm
CPA alarm acknowledge Shown in red, and TT symbol disappears after
Lost target
Initial stage
Steady tracking
CPA alarm
(collision course)
Lost target
On target passing
through operator-set
acquisition zone
On selected target
On reference target
R
Bottom center
Bottom center
4. Tracked Target (TT) Operation
Remarks
Broken circle around an echo to indicate the target
under acquisition and initial stage of tracking,
before steady-state tracking.
Within one minute after acquisition (vector still
unreliable).
Solid circle with vector indicating steady state
tracking (within three minutes after acquisition).
Plotting symbol (red) flashes to indicate the target is
predicted to come into CPA or TCPA.
CPA/TCPA alarm is acknowledged.
A red X is crossed through the TT symbol to
indicate that it is a lost target. Flashing stops after
lost target alarm is acknowledged.
Plotting symbol selected for a target acquired
manually is shown in broken lines.
Within one minute after acquisition.
Manual plotting symbol in a solid circle (within
three minutes after acquisition).
Plotting symbol (red) flashes to indicate the target is
predicted to come into CPA or TCPA.
TT symbol disappears after CPA/TCPA alarm is
acknowledged.
A red X is superimposed on the TT symbol to
indicate a lost target. Flashing stops after lost target
alarm is acknowledged. See the next page for lost
target criteria.
Symbol is red and flashing.
Target data (range, bearing, course, speed, CPA and
TCPA).
Used to calculate own ship's over-the-ground speed
(echo-referenced speed) for ground stabilization.
Appears during execution of a trial maneuver.
Appears during the TT performance test.
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