Lighthouse a125, Installation And Operation Instructions Manual

Page: 292 / 460

20.1 Radar overview
Radar is used to provide information that can help
you to track targets and measure distances and
bearings.
Radio Detection And Ranging (RADAR) is used at
sea to detect the presence of objects (known as
‘targets’) at a distance, and if they are moving, detect
their speed.
Radar works by transmitting radio pulses, then
detecting reflections of these pulses (echoes) from
objects in the area and displaying the reflections as
targets on your display.
Until you are familiar with interpreting the radar
display, every opportunity should be taken to
compare the radar screen patterns with visual
targets, such as other boats, buoys and coastal
structures. You should practise harbor and coastal
navigation during daylight hours and in clear weather
conditions.
HD and SuperHD radar
Your multifunction display can be used with radar
scanners.
HD and SuperHD radar scanners provide a range
of advantages, making it easier to discern objects
around your vessel.
HD and SuperHD radar scanners provide:
• Improved target detection.
• Full-color image.
• Dual Range operation.
• SuperHD option. This effectively increases the
transmitter power by a factor of at least 2, and
reduces the beamwidth by a similar amount.
Note: You must connect a SuperHD radar scanner
in order to use the SuperHD option.
Multiple radar scanners
The multifunction display only supports the use of
1 radar on the network.
When the radar application is opened, if multiple
radar scanners are detected then a warning
message shall be displayed. Additional scanners
will need to be removed from the network before the
radar application will function.
Radar Features
Depending on the type of Raymarine radar you
have different features will be available to you, the
table below shows which features and settings are
supported by radar type:
Feature
Non-HD
Digital
Radome
HD
Radome HD Open
Array
SuperHD
Open
Array
Color
Gain Auto /
Manual
(0-100%) Auto /
Manual
(0-100%) Auto /
Manual
(0-100%)
FTC Off/On
(0-100%)
Feature
Non-HD
Digital
Radome
HD
Radome HD Open
Array
SuperHD
Open
Array
Sea Harbour /
Coastal /
Offshore
/ Manual
(0-100%) Auto /
Manual
(0-100%) Auto /
Manual
(0-100%) Auto /
Manual
(0-100%)
Auto
Mode:
Buoy
Auto
Mode:
Harbor
Auto
Mode:
Offshore
Auto
Mode:
Coastal
Auto
Mode:
Bird
Power
Boost
Antenna
Boost
Interfer-
ence Re-
jection Off /
Normal /
High Off / On Off / On Off / On
Target Ex-
pansion Off / Low /
High Off / On Off / On Off / On
MARPA
Targets 10 25 25 25
Dual
Range
Dual
Range
Restric-
tions N/A
Scanner
Speed
24 RPM
24 RPM /
Auto 24 RPM /
Auto 24 RPM /
Auto
Parking
Offset 0-360
degrees 0-360
degrees
Antenna
Size 4ft / 6ft 4ft / 6ft
Display
Timing 0-153.6m 0-767m
(range de-
pendant) 0-767m
(range de-
pendant) 0-767m
(range de-
pendant)
STC
Preset 0-100%
292 a Series / c Series / e Series