Smiths Kelvin Hughes Nucleus 3 5000 Series, Системный справочник

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MUTE SEC TOR
192 A predefined arc (sector) of the radar antenna sweep,
over which it does not transmit radar. The sector must
be defined in the installation menu. An active mute sector is
outlined in magenta on the PPI. This is commonly used to
prevent the antenna from transmitting into a ship’s
superstructure or funnel to prevent radar reflections.
NOTE:
A Mute Sector Skew facility is provided as part of the GO
TO TEST menu (Refer to Chapter 5 for details). This allows
the Mute Sector's position to be adjusted, if required, to
compensate for any slight error in positioning.
Tar gets En tering Mute Sec tor
193
When a tracked target enters the MUTE sector, it is
automatically deleted and the warning TARGET
DELETED IN MUTE SECTOR is displayed.
NOTE:
The WARNING message is set to be acknowledged by
default, but can be configured within WARNINGS SETUP
to timeout if required.
RANGE SCALE & RANGE RINGS
194 The displayed range scale is selectable from 0.25nm
to 96nm as detailed in the table below. The number
and separation of the range rings is dependent on the range
scale in use:
Range Scale
(nm)
Range Ring
Separation (nm)
No. of Rings
0.25 0.05 5
0.5 0.1 5
0.75 0.25 3
1.5 0.25 6
3.0 0.5 6
6.0 1.0 6
12.0 2.0 6
24.0 4.0 6
48.0 8.0 6
96.0 16.0 6
PPI MODES AND PRE SEN TA TION
195 The following PPI modes are available for selection:
Relative Motion RM(R)
True Motion TM(T)
Relative Motion RM(T)
Head Up
North Up
Course Up
NOTE:
In all modes and presentations, the heading line (HL)
indicates the heading of Ownship.
Rel a tive Mo tion, Rel a tive Trails RM(R)
196 Ownship position is user-definable (up to 70% off
centre) but fixed to this point of the PPI. All target move
relative to Ownship’s course (CSE) and speed. Targets
have relative past trails (afterglow), but Ownship has no trail.
STA BILI SA TION MODE
Sea Sta bili sa tion
197
Gives the correct course (HDG) and speed though the
water. Set and Drift information is not used. Sea
stabilisation provides an excellent display for coastal
navigation , pilotage and anti collision . The true trails of
targets give an indication of their apparent true motion.
198 A single axis log (or manual speed input) and gyro
provide sensor data for sea stabilisation.
Ground Sta bili sa tion
199 Ownship log speed and heading, and an input of
tide/wind rate and direction can be used to calculate
Ownship course and speed over the ground. Without this
ground-referenced speed and course, stationary targets
would appear to drift at a rate and direction opposite to the
tide.
200 Ownship course over ground (COG) and speed over
ground (SOG) will also be calculated from a dual axis
log input. VTG input from a GPS will also provide COG and
SOG (non-EU mode only).
201 The ground stabilised true motion display can be very
useful for pilotage, when it is important to know
Ownship and other ship’s course and speed over ground in
relation to land, buoys and beacons.
NOTES
(1) A known stationary target (Navigational Mark) should
not show any movement providing there is no error in the
ground stabilisation.
(2) Course Over Ground (COG) and Speed Over Ground
(SOG) boxes are for information only.
(3) If the GPS no longer sends information or sends an
error message, then the display will revert automatically to
sea stabilisation (non-EU mode only).
Amdt. 5 1.27 July 03
KH 2020
Chap 1
CD-2486
MUTE SECTOR
Motion
Modes
Presentation
Modes