Radar Application Overview And Features - Raymarine a65 Operation Instructions Manual

16.1 Radar application overview and
features
Radio Detection And Ranging (RADAR) equipment
is used to detect the presence, distance and speed
of objects (known as 'targets'). 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 MFD.
Important: 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 vessels, buoys and
coastal structures. You should practise harbor and
coastal navigation during daylight hours and in
clear weather conditions.
1 2 3 4 5
8 9
Description
1 Radar status bar displaying:
• Range
• Radar scanner serial number
• Gain mode
• Orientation
• Motion mode
• Range ring spacing
2 Waypoint
3
Onscreen controls (Touchscreen
multifunction displays only.)
4
Guard Zone
5 Ship's Heading Marker (SHM) (Your vessel's
dead ahead bearing is indicated by the
SHM. If the cursor is placed over the SHM,
it will temporarily be removed to help placing
markers or acquiring targets etc.)
6 Radar status
7 Databox overlay
8 AIS target
9 Acquired MARPA target
226
6
10 11
Description
10 Range controls (Touchscreen multifunction
displays only.)
11 Target being acquired
Additional functionality of the Radar application
includes:
• VRM/EBL markers
• Color palettes.
If using a non-HD digital radome scanner, strongest
target returns are displayed in yellow with weaker
returns in 2 shades of blue. If using a HD Color
or SuperHD Color radar scanner, stronger target
returns show as different colors from a range of 256
colors, providing better clarity.
Note: Colors stated above refer to the default
color palette.
The size of a target on screen is dependent on many
factors and may not be proportional to its physical
size. Nearby objects may appear to be the same
size as distant larger objects.
With experience, the approximate size of different
objects can be determined by the relative size and
color / brightness of the echoes.
The size of each onscreen 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
D12207-4
• 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 overlay in the Chart application.
Radar application Features
Depending on the connected
radar scanner different
options will be available
Supports up to 2 radar
scanners connected
simultaneously
Collision Avoidance features
• Radar Features
• 16.3 Multiple radar
scanners
• 14.7 Collision Avoidance
LightHouse MFD operation instructions