that the size of a target on screen is dependent on many factors and
may not necessarily be proportional to its physical size. Nearby
objects may appear to be the same size as distant larger objects.
Note:
Colors stated above refer to the default color palette.
With experience, the approximate size of different objects can be
determined by the relative size and brightness of the echoes.
You should bear in mind that the size of each on-screen target is
affected by:
• The physical size of the reflecting object.
• The material from which the object is made. Metallic surfaces
reflect signals better than non-metallic surfaces.
• Vertical objects such as cliffs reflect signals better than sloping
objects such as sandbanks.
• High coastlines and mountainous coastal regions can be observed
at longer radar ranges. Therefore, the first sight of land may be a
mountain several miles inland from the coastline. Although the
coastline may be much nearer, it may not appear on the radar
until the vessel is closer to shore.
• Some targets, such as buoys and small vessels difficult to discern,
because they do not present a consistent reflecting surface as
they bob and toss about in the waves. Consequently these echoes
tend to fade and brighten, and at times disappear momentarily.
• Buoys and small vessels resemble each other, but vessels can
often be distinguished by their motion.
Note:
A GPS receiver and a fast heading sensor are required for
MARPA operation, and to enable radar/chart overlay.
Radar context menu
The radar application includes a context menu which provides
positional data and menu items.
The context menu provides the following positional data for the
cursor location in relation to your vessel:
• Latitude
• Longitude
• Range
• Bearing
The context menu also provide the following menu items:
•
Acquire Target
•
Place VRM/EBL
•
Place Waypoint At Cursor
•
Slew thermal camera
(Only available when thermal camera is
connected and operating.)
Accessing the context menu
You can access the context menu by following the steps below.
1. New e Series or New c Series:
i.
Selecting a location, object or target on-screen and pressing
the
Ok
button.
2. Touchscreen multifunction displays:
i.
Selecting an object or target on-screen.
ii. Selecting and holding on a location on-screen.
13.6 Dual range radar operation
The Dual Range radar function enables you to view 2 ranges at
the same time in separate windows. The function is available with
SuperHD and HD radar scanners.
Using your multifunction display and an HD or SuperHD radar
scanner, you can view either a short or a long range image in
separate radar windows.
The default setting is Long, which provides a standard scanner
range.
Limitations
• Dual Range operation is not available if MARPA targets are active.
• You cannot acquire MARPA targets if Dual Range is enabled.
• Radar/chart sync and radar/chart overlay are temporarily disabled
when Dual Range is enabled.
Dual range radar compatibility
The range covered by the short Dual Range option depends on the
radar scanner you are using, and the software version it is using.
Scanner
Dual range
mode
*Range covered
by software
versions 1.xx
to 2.xx
Range covered
by software
versions 3.xx
onwards
4 Kw HD Open
Array
Long (1)
1/8 nm to 72 nm
1/8 nm to 72 nm
Short (2)
1/8 nm to 3 nm
1/8 nm to 72 nm
4 Kw SuperHD
Open Array
Long (1)
1/8 nm to 72 nm
1/8 nm to 72 nm
Short (2)
1/8 nm to 3 nm
1/8 nm to 72 nm
12 Kw HD Open
Array
Long (1)
n/a
1/8 nm to 72 nm
Short (2)
n/a
1/8 nm to 72 nm
12 Kw SuperHD
Open Array
Long (1)
1/8 nm to 72 nm
1/8 nm to 72 nm
Short (2)
1/8 nm to 3 nm
1/8 nm to 72 nm
HD Radome
Long (1)
1/8 nm to 48 nm
1/8 nm to 48 nm
Short (2)
1/8 nm to 48 nm
1/8 nm to 48 nm
Limitations of software version 1.xx and 2.xx
• The value for the short range setting must be less than or equal to
the long range setting.
• With
Dual Range
On and a short range window active Expansion
control shall be disabled in the
Enhance Echoes
menu.
Using Dual Range with SuperHD scanners
Dual range radar operation with SuperHD scanners.
When using the short Dual Range option, a SuperHD scanner
operates in HD mode only. When using the long Dual Range option,
a SuperHD radar operates in SuperHD mode.
Using radar
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