5
4. Activating, Deactivating
the ATA
The ATA is activated/deactivated through the
menu. Acquired targets are tracked internally
when the ATA is deactivated.
1. Adjust the A/C RAIN, A/C SEA and GAIN
controls for proper radar picture.
2. Press [MENU], [7], [7] to show PLOT
MENU 1.
1. MARK DISP
OFF ON
2. ERASE
3. VECT REF
REL TRUE
4. VECT TIME
30S 1 3 6
(min)
15 30
5. CPA SET
OFF
0.5NM
1NM
1.5NM
2NM
3NM
4NM
5NM
6NM
6. TCPA SET
30S 1 2 3
(min) 4 5 6 12 15
7. TRACK
OFF ON
8. AUDIO ALARM
OFF ON
9. INTVAL 30S 1 2 3 6
(min)
0.
↓
PLOT MENU 1
Figure 3 PLOT MENU 1
3. Press the [1] key to select ON or OFF from
the MARK DISP field.
4. Press the [ENTER/SELECT] key.
5. Press the [MENU] key to close the menu.
Note: The ATA plot is automatically turned
on whenever the automatic acquisition area
or guard ring is activated or a target is se-
lected for target-based speed input.
5. Entering Own Ship’s
Speed
The ATA requires own ship’s speed and head-
ing data. Of these, the speed data can be
entered automatically from a speed log,
navaid or manually through the menu.
Note:
It is customary to use a speed relative
to water for collision avoidance and a speed
over the ground for navigation purpose.
Automatic speed input
1. Press [MENU], [0], [0] to display the
OTHER menu.
1. HDG SET
2. SPD MODE
MAN LOG NAV*
LOG (S-BT)
LOG (S-WT)
3. MAN SPD
4. SET & DRIFT
5. DISPLAY
6. MARK/LINE
7. TUNE
8. NAV DATA
9. EBL/VRM/+
0.
↓
OTHERS
* NAV shown on R-type only.
Figure 4 OTHER menu
2. Press the [2] key to select a LOG option
or NAV from the SPD MODE field.
LOG: Pulse input from speed log
NAV: Speed data from nav equipment
LOG(S-BT): Speed over ground, serial
data from speed log
LOG(S-WT): Speed relative to water,
serial data from speed log
3. Press the [ENTER/SELECT] key.
4. Press the [MENU] key to close the menu.
Notes:
1) IMO Resolution A.823(19) for ARPA rec-
ommends that a speed log to be inter-
faced with an ARPA should be capable of
providing through-the-water speed. This
shall apply to the ATA operation as well.
2) Be sure not to select LOG when a speed
log is not connected. If the log signal is
not provided, the ship’s speed readout at
the screen top will be blank.
3) SPEED xx.x and “SIGNAL MISSING
LOG” appear if no log signal is present
for 30 seconds.
