Smiths Kelvin Hughes Nucleus 3 5000 Series, System Handbook

Page: 89 / 510

TARGET TOTE
103 This shows varied information on multiple targets:
Range/bearing (BRG), speed/course (CRSE), TCPA
(Time to Closest Point of Approach) CPA (Closest Point of
Approach) and BCT (Bow Crossing Time) BCR (Bow
Crossing Range) and can be shown with six targets
simultaneously.
104 To execute the facility:
(1) Select a target from the radar display, place the
cursor over the target, press the centre
pushbutton (Select), the target blinks to verify it
has been chosen.
(2) An information display on the target selected then
appears on the right side of the display. This
shows target information, as does target tote, but
can only display it in this way one target at a time.
105 To execute the tote mode:
(1) Place the cursor in the TOTE box, located over to
the top-right of the target information display,
press any of the pushbuttons to activate.
(2) The initial target information display is replaced by
the Target Tote display. This shows information
on the speed/course (CRSE), range/bearing
(BRG), T CPA/CPA and BCT/BCR of six
independent targets.
(3) To switch between the different data types:
(a) Place the cursor over the bar at the top of the
target information display. An information box
appears below the radar display:
(b) Select until the data to be analysed appears.
(4) The ranking of the target information may be
arranged. The order may be TCPA within CPA ,
closest CPA or shortest TCPA. To switch through
the different ranking types:
(a) Place the cursor over the bar at the top of the
Target Tote display.
(b) Press the centre pushbutton continuously
until the ranking type you want to analyse
appears.
(5) To return to the single target information display,
place the cursor over the bar at the top of the target
tote display then press the right-hand pushbutton.
NOTE:
The tote may be removed and replaced by full TARGET
DATA should a warning situation develop (e.g. Collision
Warning) or any other target selected using the cursor.
PLOTTING LIM I TA TIONS
106 Target plotting limitations using the ARPA include the
following:
(1) Operator’s skill and accuracy when manually
entering the Ownship’s speed.
NOTE:
When using the manual speed input method, the Operator
MUST adjust the speed input manually every time that the
Ownship changes speed.
For sea stabilised displays, the input speed MUST be
Ownship’s speed over the water NOT over the ground.
(2) A maximum of 50 targets can be tracked at any
one time. Attempts to track more than 50 targets
at once result in a TRACKING OVERLOAD alarm.
NOTE:
To track another target, when 50 are already selected, one
of the currently tracked targets must first be removed from
tracking.
(3) The tracking accuracy of the ARPA is
± 2 deg. (or
±
3 deg. for 1 minute duration, following target
manoeuvre).
(4) A maximum of 4 past positions only are displayed
for each tracked target.
KH 2020
Chap 2b
July 03 2b.16 Amdt 5
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