Heading Line And Angle Markers; Setting The Heading Line And Angle Markers; Sonar Fishfinder; Stopping The Transmission Of Sonar Signals - Garmin GPSMAP 7400 Owner's Manual

Heading Line and Angle Markers

The heading line is an extension drawn on the map from the
bow of the boat in the direction of travel. Angle markers indicate
relative position from the heading or course over ground, which
are helpful for casting or finding reference points.

Setting the Heading Line and Angle Markers

The heading line is an extension drawn on the map from the
bow of the boat in the direction of travel. Angle markers indicate
relative position from the heading or course over ground, which
are helpful for casting or finding reference points.
You can show the heading line and the course over ground
(COG) line on the chart.
COG is your direction of movement. Heading is the direction the
bow of the boat is pointed, when a heading sensor is connected.
1
From a chart, select Menu > Layers > My Vessel > Heading
Line.
2
Angle Markers
3
If necessary, select Source, and select an option:
• To automatically use the available source, select Auto.
• To use the GPS antenna heading for COG, select GPS
Heading (COG).
• To use data from a connected heading sensor, select
North Reference.
• To use data from both a connected heading sensor and
the GPS antenna, select COG and Heading.
This displays both the heading line and the COG line on
the chart.
4
Select Display, and select an option:
• Select Distance > Distance, and enter the length of the
line shown on the chart.
• Select Time > Time, and enter the time used to calculate
the distance your boat will travel in the specified time at
your present speed.

Sonar Fishfinder

When properly connected to a compatible transducer, your
chartplotter can be used as a fishfinder.
For more information about which transducer is best for your
needs, go to www.garmin.com/transducers.
Different sonar views can help you view the fish in the area. The
sonar views available vary depending on the type of transducer
and sounder module connected to the chartplotter. For example,
you can view certain Panoptix
compatible Panoptix transducer connected.
There are four basic styles of sonar views available: a full-
screen view, a split-screen view that combines two or more
views, a split-zoom view, and a split-frequency view that
displays two different frequencies. You can customize the
settings for each view in the screen. For example, if you are
viewing the split-frequency view, you can separately adjust the
gain for each frequency.
If you do not see an arrangement of sonar views to suit your
needs, you can create a custom combination screen
New Combination Page, page
a SmartMode Layout, page

Stopping the Transmission of Sonar Signals

From a sonar screen, select Menu > Transmit.

Changing the Sonar View

1 From a combination screen or SmartMode layout with sonar,
select the window to change.
2
Select Menu > Change Sonar.
Sonar Fishfinder
™ sonar screens only if you have a
(Creating a
3) or a SmartMode layout
2).
3
Select a sonar view.

Traditional Sonar View

There are several full-screen views available, depending on the
equipment connected.
The full-screen Traditional sonar view show a large image of the
sonar readings from a transducer. The range scale along the
right side of the screen shows the depth of detected objects as
the screen scrolls from the right to the left.
Depth information
Suspended targets or fish
Bottom of the body of water

Split-Frequency Sonar View

In the split-frequency sonar view, one side of the screen shows
a full-view graph of high frequency sonar data, and the other
side of the screen shows a full-view graph of lower frequency
sonar data.
NOTE: The split-frequency sonar view requires the use of a
dual-frequency transducer.

Split-Zoom Sonar View

The split-zoom sonar view shows a full-view graph of sonar
readings, and a magnified portion of that graph, on the same
screen.
Garmin ClearVü Sonar View
NOTE: To receive Garmin ClearVü scanning sonar, you need a
compatible chartplotter or fishfinder and a compatible
transducer. For information about compatible transducers, go to
www.garmin.com/transducers.
Garmin ClearVü high-frequency sonar provides a detailed
picture of the fishing environment around the boat in a detailed
representation of structures the boat is passing over.
Traditional transducers emit a conical beam. The Garmin
ClearVü scanning sonar technology emits two narrow beams,
similar to the shape of the beam in a copying machine. These
beams provide a clearer, picture-like image of what is beneath
the boat.
(Adding
SideVü Sonar View
NOTE: Not all models provide built-in SideVü sonar support. If
your model does not provide built-in SideVü sonar, you need a
compatible sounder module and compatible SideVü transducer.
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