Garmin GPSMAP 740 Owner's Manual

Also see for GPSMAP 720: Technical reference Important safety information Owner's manual Installation instructions Quick reference guide

Contents

Garmin GPSMAP 740 Owner's Manual Manual pdf 79 page image

GPSMAP 700 Series Owner’s Manual 75SonarShowing Surface NoiseYou can set whether the sonar returns near the surface of the water appear. Hide surface noise to help reduceclutter.From the Home screen, select Sonar > Sonar Setup > Surface Noise > Show.Showing and Configuring a Depth LineYou 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 A-ScopeThe A-Scope is a vertical flasher along the right side of the screen that shows instantaneously the range totargets along a scale.From the Home screen, select Sonar > Sonar Setup > A-Scope > on.Setting Pic AdvanceThe picture advance setting allows the sonar picture to advance faster by drawing more than one column ofdata on the screen for each column of sounder data received. This is especially helpful when you are usingthe sounder in deep water, because the sonar signal takes longer to travel to the water bottom and back to thetransducer.The 1/1 setting draws one column of information on the screen per sounder return. The 2/1 setting draws twocolumns of information on the screen per sounder return, and so on for the 4/1 and 8/1 settings.1. From the Home screen, select Sonar > Sonar Setup > Pic. Advance.2. Select a picture advance setting.Showing Overlay NumbersYou must have a water-speed sensor or a speed-capable transducer to show water-speed information, andyou must have a water-temperature sensor or a temperature-capable transducer to show water-temperatureinformation.You can set water temperature, unit voltage, water speed (if your transducer is capable), and navigationinformation to appear automatically on the Sonar screens. The navigation information always includes GPSspeed and GPS heading, and includes bearing and off-course information while navigating.1. From the Home screen, select Sonar > Sonar Setup > overlay Numbers.2. Complete an action:• Select Depth > Show.• Select Water Temp > Auto.• Select Water Speed > Auto.• Select Unit Voltage > Show.• Select Navigation > Auto.If you select Auto, and if the information is available, the data appears on the Sonar screen.Configuring the Appearance of Suspended TargetsYou can set how the sonar interprets suspended targets.1. From the Home screen, select Sonar > Sonar Setup > Appearance > Fish Symbols.2. Complete an action:• Select to show suspended targets as symbols with background sonar information.• Select to show suspended targets as symbols with background sonar information and target depthinformation.• Select to show suspended targets as symbols.• Select to show suspended targets as symbols with target depth information.