How To Acquire And Track Targets; How To Manually Acquire A Target - Furuno FAR-2218-BB Operator's Manual

3. TARGET TRACKING (TT)
3.5

How to Acquire and Track Targets

Place the cursor on the TT acquisition mode indicator, then press the left button. The
indication changes, depending on the TT mode selected (See section 3.4.1). The ta-
ble below shows the indication changes based on mode selection.
TT mode selected
[MANUAL 100]
[MANUAL 75 • AUTO 25]
[MANUAL 50 • AUTO 50]
[MANUAL 25 • AUTO 75]
[AUTO 100]
3.5.1

How to manually acquire a target

Acquire a target from the Control Unit (RCU-014)
Use the trackball to place the cursor on the target you want to acquire, then press the
ACQ key.
Acquire a target by the trackball module
1. When the target to acquire and the AIS symbol overlap one another, right-click the
operational display area to show the [CURSOR MENU] then select [TT TARGET
DATA/ACQ] to acquire the target.
2. Place the cursor on the target to acquire then left-click.
The plotting symbol is drawn by a dashed circle during the initial acquisition stage. A
vector appears approximately one minute after acquisition. The vector indicates the
motion trend of the target. If the target is consistently detected for three minutes, the
plotting symbol changes to a solid circle. If acquisition fails, the target symbol blinks.
At acquisition
Note 1: For successful acquisition, the target should be within 24 NM (or 32 NM, de-
pending on initial setting) from own ship and not obscured by sea or rain clutter.
Note 2: You are alerted when the capacity of manual acquisition is 95% and 100%.
These alerts are "TT TARGET95%(MAN)" and "TT TARGET FULL(MAN)". If the capac-
ity is 100% you cannot acquire more targets. Cancel tracking of non-threatening targets
if you wish to acquire additional targets manually.
Note 3: When a target being tracked nears another target being tracked, the targets
may be "swapped". When two targets acquired either automatically or manually come
close to each other, one of the two may become a lost target. If this occurs, manual re-
acquisition of the lost target may be necessary after the two have separated.
Note 4: You can reuse a target number. This is useful when you acquire the "wrong"
target. Drag and drop the symbol onto the correct target.
3.5.2 How to automatically acquire targets
Targets are automatically acquired when the TT mode is set to other than [MANUAL
100] and a target enters the acquisition zone (see section 3.16). The maximum track-
ing distance (24 NM or 32 NM) is set at installation.
3-4
"TT OFF" "TT MAN"
"TT OFF" "TT MAN/AUTO"
"TT OFF" "TT MAN/AUTO"
"TT OFF" "TT MAN/AUTO"
"TT OFF" "TT AUTO"
Vector
Within 1 min. after acquisition
Indication change
"TT OFF"...
"TT OFF"...
"TT OFF"...
"TT OFF"...
"TT OFF"...
Stable tracking