Furuno FR-1500 - Manual (Page 69)

-2.7-
The plot symbol changes its shape according to the status as below. A vector appears in about
one minute after acquisition, indicating the target’s motion trend. If the target is consistently
detected for three minutes, the plot symbol changes to a solid mark. If acquisition fails, the target
symbol blinks and disappears shortly.
List of plot symbols
○ ○ ○ ○
R1
Reference target under steady tracking condition
20 scans of initial tracking
60 scans of initial tracking (Steady tracking)
1 Target selected for data readout
CPA alarm
Target in guard zone
Lost target is indicated by flashing diamond symbol. The diamond is formed
from two equal triangles. The lost target disappears after a while.
CAUTION - TARGET SWAP
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. Should this happen,
manual re-acquisition of the Lost Target may be required after the two have
separated.
2.5.2 Automatic acquisition
1. Press [MENU], [7], [7] to display the PLOT menu.
2. Press the [0] key twice.
3. Press the [2] key to select SET from the AUTO ACQ field.
4. Press the [ENTER/SELECT] key.
5. Place the cursor at upper (lower) left edge of area and press the [ENTER/SELECT] key.
6. Place the cursor at the lower (upper) right edge of the area and press the
[ENTER/SELECT] key.
A
B
0.5 nm