Garmin GPSMAP 902 series, Owner'S Manual

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Transmit Rate : Sets the length of time between sonar pings.
Increasing the transmit rate increases the scroll speed, but it
may also increase self-interference.
Reducing the transmit rate increases the spacing between
transmit pulses and can resolve self-interference.
Transmit Power : Reduces transducer ringing near the surface.
A lower transmit power value reduces transducer ringing, but
can also reduce the strength of the returns.
Filter Width : Defines the edges of the target. A shorter filter
more clearly defines the edges of the targets but may allow
more noise. A longer filter creates softer target edges and
may also reduce noise.
Transducer Diagnostics : Shows details about the transducer.
Flip Left/Right : Switches the SideVü view orientation from left
to right.
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.
Flipped : Sets the orientation of the Panoptix sonar view when
the down view transducer is installed with the cables pointing
toward the port side of the boat.
Beam Width : Sets the width of the Panoptix transducer beam.
Narrow beam widths allow you to see deeper and farther.
Wider beam widths allow you to see more coverage area.
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.
Sonar Recordings
Recording the Sonar Display
NOTE: Not all models support sonar recording.
1
Insert a memory card into the card slot.
2
From a sonar view, select Menu > Sonar Setup > Sonar
Recording > Record Sonar .
15 minutes of sonar recording uses approximately 200 MB of
space of the inserted memory card. You can record sonar
until the card reaches capacity.
Stopping the Sonar Recording
Before you can stop recording sonar, you must begin recording
it ( Recording the Sonar Display , page 24 ).
From a sonar view, select Menu > Sonar Setup > Sonar
Recording > Stop Recording .
Deleting a Sonar Recording
1
Insert a memory card into the card slot.
2
From a sonar view, select Menu > Sonar Setup > Sonar
Recordings > View Recordings .
3 Select a recording.
4 Select Delete .
Playing Sonar Recordings
Before you can play back the sonar recordings, you must
download and install the HomePort ™ application and record
sonar data onto a memory card.
1
Remove the memory card from the device.
2
Insert the memory card into a card reader attached to a
computer.
3
Open the HomePort application.
4 Select a sonar recording from your device list.
5
Right-click the sonar recording in the lower pane.
6
Select Playback .
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.
When the radar is transmitting, do not look directly at the
antenna at close range; 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.
Changing the Radar Mode
1
From a combination screen or SmartMode layout with radar,
select Menu > Radar Menu > Change Radar .
2 Select a radar mode.
Transmitting Radar Signals
NOTE: As a safety feature, the radar enters standby mode after
it warms up. This gives you an opportunity to verify the area
around the radar is clear before beginning radar transmission.
1
With the chartplotter off, connect your radar as described in
the radar installation instructions.
2
Turn on the chartplotter.
If necessary, the radar warms up and a countdown alerts you
when the radar is ready.
3
Select Radar .
4
Select a radar mode.
A countdown message appears while the radar is starting up.
5
Select Menu > Transmit Radar .
Stopping the Transmission of Radar Signals
From a radar screen, select Menu > Radar To Standby .
TIP: Press > Radar To Standby from any screen to
quickly stop radar transmission.
Setting Up the Timed Transmit Mode
To help conserve power, you can set up time intervals in which
the radar will transmit and not transmit (standby) signal
transmissions.
NOTE: This feature is not available in dual radar modes.
1 From a radar screen, select Menu > Radar Options > Timed
Transmit .
2
Select Timed Transmit to enable the option.
3
Select Stdby Time , enter the time interval between radar
signal transmissions, and select Done .
4 Select Transmit Time , enter the duration of each radar
signal transmission, and select Done .
Enabling and Adjusting a Radar No Transmit Zone
You can indicate an area within which the radar scanner does
not transmit signals.
NOTE: This feature is not available on all radar and chartplotter
models.
24 Radar