Raymarine gS Series, Installation And Operation Instructions Manual, Page: 136 / 208

18.12 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.
Scanner Dual Range mode Operating mode
4 Kw SuperHD Open
Array Long SuperHD
Short HD
12 Kw SuperHD Open
Array Long SuperHD
Short HD
Enabling Dual Range radar operation
In the radar application.
1. Select Menu .
2. Select Presentation .
3. Select Dual Range so that On is highlighted.
Selecting Dual Range will switch between dual range On
and Off.
Selecting range operation
With Dual Range set to on and the radar application screen
displayed:
1. Select Menu .
2. Select Presentation .
3. Select Dual Range Channel to switch between 1 or 2, as
appropriate.
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gS Series