Garmin 740 S Owners Manual

GPSMAP 700 Series Owner’s Manual 67
Radar 
Configuring Data Fields on a Radar
You can select the type of data shown within a data field.
1. From the Home screen, select  Radar.
2.  Select  Cruising, Harbor, offshore, or Sentry mode.
3.  Select  Menu > Radar Setup > overlay Numbers.
4.  Select 
 or  to select a data overlay.
5.  Touch a data field.
6.  Select a category of data.
7.  Select the data to be displayed.
Configuring the Navigation Inset on the Radar Screen
The navigation inset is shown only...

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Radar
Shifting the Field of View on the Radar Screen
You can shift your present location toward the bottom of the screen automatically as your speed increases. 
Enter your top speed for the best results. This setting applies to every radar mode. This setting does not apply 
to the Radar Overlay.
1.  From the Home screen, select  Radar > Radar Setup > Appearance > Look-Ahd Spd  > on.
2.  Enter the top speed at which you expect to navigate.
3.  Select  Done.
Radar...

GPSMAP 700 Series Owner’s Manual 69
Radar 
Front-of-boat Offset
The front-of-boat offset compensates for the physical location of the radar scanner on a boat, if the radar 
scanner does not align with the bow-stern axis.
Measuring the Potential Front-of-boat Offset
1. Using a magnetic compass, take an optical bearing of a stationary tar get located within viewable range.
2.  Measure the target bearing on the radar.
3.  If the bearing deviation is more than +/- 1°, set the front-of-boat of fset.
Setting...

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Radar
Radar Overlay Navigation Display Settings
Changing the Map Zoom Detail
You can adjust the amount of detail shown on the map, at different zoom levels, for the Radar Overlay.
1. From the Home screen, select  Charts > Radar overlay > Menu > Setup > Chart Setup > Detail.
2.  Select a level of detail.
Showing and Configuring the Heading Line
The heading line is an extension drawn on the map from the bow of the boat in the direction of travel.  You can 
configure the...

GPSMAP 700 Series Owner’s Manual 71
Sonar 
Sonar
When connected to a transducer, the following 700 series models can be used as fishfinders:
• GPSMAP 720s
•  GPSMAP 740s
•  GPSMAP 750s
Sonar Views
The chartplotter shows sonar data using three different views: a full-screen view, a split-zoom view, and a 
split-frequency view.
Full-screen Sonar View
The full-screen sonar view shows a full-view graph of sonar readings from a transducer . The range scale along 
the right side of the screen shows the depth...

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Sonar
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.
From the Home screen, select Sonar > Split Zoom.
Split-zoom Sonar View
➎
➊
➌
➐
➏
➋
➍
➊Depth, water speed, and unit voltage➋Zoomed depth scale
➌GPS speed and GPS heading➍Zoom window
➎Range➏Zoom window
➐Transducer frequency
Split-frequency Sonar View
In the split-frequency sonar view, the left side of the screen...

GPSMAP 700 Series Owner’s Manual 73
Sonar 
Depth Log
If you are using a depth-capable transducer, or are receiving water depth information via NMEA 0183 or 
NMEA  2000, the Depth Log displays a graphic log of depth readings over time.  The depth appears in the 
upper-left corner of the screen. The graph scrolls to the left as information is received.
From the Home screen, select  Sonar > Depth Log. 
Setting the Depth Log Range and Time Scales
You can indicate the amount of time and the range of depth...

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Sonar
3. Complete an action:
• Select  Duration to set the time-elapsed scale 
➊. The default setting is 10 minutes. Increasing the time-
elapsed scale allows you to view temperature variations over a longer period of time. Decreasing the 
time-elapsed scale allows you to view more detail over a shorter period of time. 
•  Select  Scale to set the temperature-range scale 
➋. The default setting is 4 degrees. Increasing the 
temperature-range scale allows you to view...

GPSMAP 700 Series Owner’s Manual 75
Sonar 
Showing Surface Noise
You can set whether the sonar returns near the surface of the water appear. Hide surface noise to help reduce 
clutter.
From the Home screen, select  Sonar > Sonar Setup > Surface Noise > Show.
Showing and Configuring a Depth Line
You can set whether a quick-reference depth line appears.
1. From the Home screen, select  Sonar > Sonar Setup > Depth Line > Show.
2.  Touch and drag the reference line to set the depth of the line.
Showing the...

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Sonar
Showing and Configuring the Whiteline
You can highlight the strongest signal from the bottom to help define the hardness or softness of the signal.
1. From the Home screen, select  Sonar > Sonar Setup > Whiteline .
2.  Complete an action:
• Select  High to turn on the whiteline with the most-sensitive setting. Almost all strong returns are 
highlighted in white.
•  Select  Medium to turn on the whiteline with many strong returns highlighted in white.
•  Select...