Smiths Kelvin Hughes Nucleus 3 5000 Series, Системный справочник

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ATA PLOTTING CON TROLS
Ac quire Tar get
8 To manually acquire a target, position the cursor over
the target and press the
[ACQ] Acquire pushbutton,
the target is labelled with a symbol. Within 12 scans a target
vector is generated and within 3 minutes the vector is stable.
Se lect
9
To select a target, position the cursor over the target
and press and release the
[Select] pushbutton. The
target plot symbol and vector flash to acknowledge
selection. Once the target is selected, full target information
is available in the target data field provided that the target is
being tracked.
NOTE:
When the SELECT pushbutton is pressed the target vector
flashes.
De lete
10 Position the cursor on the target and press the [Select]
pushbutton, press the [Delete] pushbutton and the
tracking/plotting on the target ceases. Targets causing a
collision warning cannot be deleted until acknowledged.
NOTE:
Ensure that the correct target, map or navigation line or
symbol is selected before pressing the DELETE
pushbutton.
Vec tor Mode
11 Change the vector presentation mode by positioning
the cursor in the Vector menu; press and hold the
[T. or
R. Mode] pushbutton for 4 seconds. The Vector box is
outlined in red to indicate that vectors are displayed in the
opposite presentation mode to that of the display, plus a Red
Warning box as below. To return the Vectors to the correct
presentation mode repeat the procedure. This function is not
available in Trial Manoeuvre mode.
Vec tor Time (Vec tor Length)
12 The vector time can be changed between 1 and 30
minutes, in increments of 1 minute, by pressing and
operating the trackerball in the vertical plane to increase or
decrease the time shown next to VECTORS in the
OWNSHIP DATA field.
13 The default or initial value of vectors is 15 minutes. The
length of the vector is proportional to the speed of the
target (e.g. target speed 12 knots (KT) then vector length is
3nm, which is the distance the target travels in 15 minutes).
Tar get Data
14 To display target data, position the cursor on or near
the required target/vector and press the
[Select]
pushbutton. The target plot symbols and vector flash; data
on the selected target is displayed/ updated in the TARGET
DATA field every scan.
NOTE:
Between acquiring a target and the Computer generating a
vector, the TARGET DATA shows Range and Bearing
(BRG). Target course (CRSE) and speed are ‘True’.
15 To vary either the [CPA LIMIT] or the [TCPA LIMIT]
select the function and press and hold down the left
pushbutton, operate the trackerball in the vertical plane to
increase or decrease the limit value. Press the centre
pushbutton to enter the minimum (MINIM) value and the
right pushbutton to enter the maximum (MAX) value.
16
The default values are 15min (TCPA) and 1nm (CPA).
ATA ALARMS
17
ATA Alarms, listed below, are displayed in a RED
highlighted box on the right-hand side of the screen. If
the ATA computer is not available the following message is
displayed:
18
With the ATA functioning, warnings produce an
audible alarm and the following alarm messages may
be displayed in the highlighted box:
(1)
When a target is
within both CPA and TCPA, a flashing symbol is
generated on the target plus TARGET DATA.
(2)
When a target is lost
this message appears and is always shown until
the target is deleted.
(3)
If a target is not seen
for eight consecutive scans the target is counted
as weak and the Lost Target symbol appears in
the last vector position. If the target is of interest,
after a further 10 sweeps the target is designated
as ‘Lost’ and an Acknowledge box appears above
the warning box.
(4)
O c c u r s wh e n t h e
computer is tracking to maximum capacity and
any additional target is acquired.
(5)
If the computer fails
after initialisation.
KH 2020
Chap 2b
July 03 2b.2 Amdt 5
CD-2073
VECTOR MODE
SET TO TRUE
CD-2077a
THE ATA
COMPUTER HAS NOT
BEEN FITTED
Collision Warning
Weak echo Search
Lost Target
Tracking Overload
ATA Failure