see closer objects more clearly while keeping farther
objects on the screen.
LiveScope and Perspective Transducer Installation
Settings
From the LiveScope or Perspective sonar view, select
Options
>
Sonar Setup
>
Installation
.
Install Depth
: Sets the depth below the water line where
the Panoptix transducer is mounted. Entering the actual
depth at which the transducer is mounted results in
a more accurate visual presentation of what is in the
water.
Use AHRS
: Enables the internal attitude heading
and reference system (AHRS) sensors to detect
the installation angle of the Panoptix transducer
automatically. When this setting is turned off, you can
enter the specific installation angle for the transducer
using the Pitch Angle setting. Many forward view
transducers are installed at a 45-degree angle and
down view transducers are installed at a zero-degree
angle.
Calibrate Compass
: Calibrates the internal compass
in the Panoptix transducer (
).
This applies to LiveScope transducers with an internal
compass.
Orientation
: Controls if the transducer is in down or
forward installation mode. The Auto setting uses the
AHRS sensor to determine the orientation.
Focus
: Adjusts the sonar view to compensate for the
speed of sound in water. The Auto setting uses the
temperature of the water to calculate the speed of
sound.
Restore Sonar Defaults
: Restores the sonar settings to
the factory default values.
Radar
WARNING
The marine radar transmits microwave energy that has
the potential to be harmful to humans and animals.
Before beginning radar transmission, verify that the area
around the radar is clear. The radar transmits a beam
approximately 12° above and below a line extending
horizontally from the center of the radar.
To avoid possible personal injury, do not look directly
at the antenna at close range when the radar is
transmitting. Eyes are the most sensitive part of the body
to electromagnetic energy.
When you connect your compatible chartplotter to an
optional Garmin marine radar, such as a GMR
™
Fantom
™
6 radar or a GMR 24 xHD, you can view more information
about your surroundings.
The radar transmits a narrow beam of microwave energy
as it rotates to a 360° pattern. When the transmitted
energy contacts a target, some of that energy is reflected
back to the radar.
Radar Interpretation
Reading and interpreting the radar display takes practice.
The more you use the radar, the better you will become at
relying on the radar display when you really need it.
Radar can be useful in many situations, such as avoiding
collisions when you have limited visibility, for example
when it is dark or foggy, tracking weather, seeing what
is ahead of you, and locating birds and fish.
The radar overlay feature can help you interpret the
radar display more easily, because it overlays the radar
returns on top of the chart. This can help you identify
the difference between a radar return of a land mass,
bridge, or rain cloud. Showing the AIS vessels on the
radar overlay can also help you identify features on the
radar display.
In the screenshot below, the radar overlay is turned on.
This screen also shows a video feed. We can easily
identify a few items on the radar screen.
Land
Vessel
Radar Overlay
When you connect your chartplotter to an optional Garmin
marine radar, you can use overlay radar information on
the Navigation chart or on the Fishing chart.
Data appears on the radar overlay based on the most
recently used radar mode and all settings configurations
applied to the radar overlay are also applied to the last-
used radar mode.
Radar Overlay and Chart Data Alignment
When using the Radar overlay, the chartplotter aligns
radar data with chart data based on the boat heading,
which is based by default on data from a magnetic
heading sensor connected using a NMEA 0183 or NMEA
2000 network. If a heading sensor is not available, the
boat heading is based on GPS tracking data.
GPS tracking data indicates the direction in which the boat
is moving, not the direction in which the boat is pointing. If
the boat is drifting backward or sideways due to a current
or wind, the Radar overlay may not perfectly align with
the chart data. This situation should be avoided by using
boat-heading data from an electronic compass.
If the boat heading is based on data from a magnetic
heading sensor or an automatic pilot, the heading data
could be compromised due to incorrect setup, mechanical
malfunction, magnetic interference, or other factors. If the
50
Radar
