Garmin GPSMAP 396 User Manual download pdf (Page 147)

GPSMAP 396 Owner’s Manual 139

settIng uP And usIng sonAr > settIng uP the sonAr PAge

Setting Up the Sonar Page

Use the Sonar tab in the Main Menu to set up the Sonar Page. Press

MENU two times to open the Main Menu. Select Sonar from the

vertical row of tabs on the left, then select Setup from the row of

tabs along the top of the screen.

Sonar Tab of the Main Menu

Fish Symbols—select how the Sonar Page shows underwater targets

and background information. If you select Off, the unit shows all

of the available information about the underwater environment. If

you select a sh symbol, the Sonar Page shows only the information

related to that symbol.

Water Type

—select the proper water type you are boating in. Since

sound waves travel through Fresh and Salt water at different rates, it

is necessary to select the Water Type to ensure accurate readings on

the unit.

Depth Number

—select how efcient the digital depth update rate

is. Fast Sonar update updates quicker and is recommended for low-

noise water deeper than 50 feet. Auto is best for shallow water or

high-noise areas, has a slower screen update, and is best used if you

travel a wide variety of depths.

If the unit is unable to track the bottom for any reason, the digits in

the depth window ash on and off to alert you that the unit is not

tracking the bottom.

Map Split Sonar Detail—select how much detail is shown on the

Map Page with the sonar shown. Full Range shows data using the

Range setting of the Sonar Page, regardless of Zoom or Bottom

Lock. Maximum Detail shows any Zoom or Bottom Lock data

from the Sonar Page.

Keel Offset

—enter the surface reading for the depth of a keel. This

makes it possible to measure depth from the bottom of your keel

instead of from the transducer’s location. Enter a positive number

to offset for a keel. It is also possible to enter a negative number to

compensate for a large vessel that draws several feet of water. The

Keel Offset is reected in the depth reading.

Transducer—

select the type of transducer that you are using. If you

are using a speed-capable transducer/sensor, select Temp, Spd.

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Garmin GPSMAP 396 User Manual Page 147