Garmin 740 S Owners Manual

GPSMAP 700 Series Owner’s Manual 77
Sonar 
Adjusting the Range of the Depth Scale
You can adjust the range of the depth scale that appears on the right side of the screen.
1. From the Home screen, select  Sonar.
2.  Select a sonar view.
3.  Select  Menu > Range.
4.  Complete an action:
• Select  Auto to allow the chartplotter to adjust the depth scale automatically .
•  Select  Up or Down to increase or decrease the range of the depth scale manually.
5.  Select  Done.
NoTe: From the sonar screen, you can...

78 GPSMAP 700 Series Owner’s Manual
Sonar
Transducer Configuration
Setting the Keel Offset
The keel offset compensates for the surface reading for the depth of a keel, making it possible to measure 
depth from the bottom of the keel instead of from the transducer location. Enter a positive number to of fset for 
a keel. You can enter a negative number to compensate for a large vessel that may draw several feet of water.
1.  Complete an action, based on the location of the transducer:
• If the transducer...

GPSMAP 700 Series Owner’s Manual 79
Digital Selective Calling 
Digital Selective Calling
Chartplotter and VHF Radio Functionality
The following table indicates the features that are available when you connect your chartplotter to a VHF radio 
over a NMEA 0183 network or a NMEA 2000 network.
Functionality NMEA 0183 
VHF RadioNMEA 2000 
VHF RadioGarmin NMEA 
0183 VHF 
RadioGarmin NMEA 
2000 VHF 
Radio
The chartplotter can transfer your GPS 
position to your radio. If your radio is 
capable, GPS position...

80 GPSMAP 700 Series Owner’s Manual
Digital Selective Calling
Adding a DSC Contact
You can add a vessel to your DSC list. You can make calls to a DSC contact from the chartplotter ( page 83). 
1.  From the Home screen, select  Information > other Vessels > DSC List > Add Contact .
2.  Enter the Maritime Mobile Service Identity (MMSI) of the vessel.
3.  Select  Done.
4.  Enter the name of the vessel.
5.  Select  Done.
Incoming Distress Calls
If your Garmin chartplotter and VHF radio are connected using...

GPSMAP 700 Series Owner’s Manual 81
Digital Selective Calling 
Position Tracking
When you connect your Garmin chartplotter to a VHF radio using NMEA 0183, you can track vessels that 
send position reports. This feature is also available with NMEA 2000, provided that the vessel sends the 
correct PGN data (PGN 129808; DSC Call Information).
Every position-report call received is logged in the DSC list (page 79).
Viewing a Position Report
1. From the Home screen, select  Information > other Vessels > DSC...

82 GPSMAP 700 Series Owner’s Manual
Digital Selective Calling
Vessel Trails on the Navigation Chart
You can view trails for all tracked vessels on the Navigation chart, the Fishing chart, and the Mariner’s Eye 3D 
chart view. By default, a black dot 
➊ appears for each previously reported position of a tracked vessel, and a 
Blue Flag symbol 
➋ indicates the last reported position of the vessel. A black line ➌ indicating the path of the 
vessel also appears. 
You must enable the DSC Trails setting in...

GPSMAP 700 Series Owner’s Manual 83
Digital Selective Calling 
Changing the Appearance of a Trail Line
You can change the appearance of a trail line for a specific tracked vessel.
NoTe: The Mariner’s Eye 3D chart is available if you use a BlueChart g2 Vision SD card. The Fishing chart 
is available if you use a BlueChart g2  Vision SD card or a BlueChart g2 SD card, or if your built-in map 
supports Fishing charts.
1.  From the Home screen, select  Charts.
2.   Select  Navigation Chart, Fishing Chart,...

84 GPSMAP 700 Series Owner’s Manual
Appendix
Appendix
Specifications
Physical Specifications
SpecificationMeasurement
Size W × H × D: 8 
29/32 × 5 19/32 × 3 1/8 in. (226 × 142 × 80 mm)
Weight 2.48 lb. (1.125 kg)
Display W × H: 6 × 3 
19/32 in. (152 × 91 mm)
Case Fully gasketed, high-impact plastic and aluminum alloy, waterproof to IEC 60529 IPX-7
Temp. Range From 5°F to 131°F (from -15°C to 55°C)
Compass Safe 
Distance 32.0 in. (813 mm)
GPS Performance
Specification
ParameterMeasurement
Receiver...

GPSMAP 700 Series Owner’s Manual 85
Appendix 
Screenshots
You can capture as a bitmap (.BMP) file a screenshot of any screen shown on your chartplotter, and transfer 
the file to your computer.
Capturing Screenshots
1. Insert a memory card into the SD card slot on the front of the chartplotter . 
2.  Select  Configure > System > Beeper/Display  > Screenshot Capture > on.
3.  Go to a screen you want to capture.
4.  Press HoMe  for at least six seconds.
The Screenshot Taken window appears.
5.  Select  oK....

86 GPSMAP 700 Series Owner’s Manual
Appendix
Restoring the Original Chartplotter Factory Settings
NoTe: This procedure deletes all settings information you have entered.
1. From the Home screen, select  Configure > System > System Information > Factory Settings.
2.  Select  Yes.
NMEA 0183 and NMEA 2000
A GPSMAP 700 series chartplotter can accept data from both NMEA 0183-compliant devices and certain 
NMEA 2000 devices connected to an existing NMEA 2000 network on your boat.
NMEA 0183
The NMEA 0183 data...