Garmin GPSMAP 3010C User Manual download pdf (Page 92)

84 GPSMAP 3006C/3010C Owner’s Manual

usIng sonar > sonar tab

sonar

To calibrate the water speed:

1. OntheSonartab,presstheCal Water Spdsoftkey.

2. Bringtheboattocruisingspeed.Boththetopgroundanduncalibrated

waterspeedsareshownatthebottomofthecalibrationwindow.Noteyour

topspeed,stoptheboat,andpressENTER.

3. Bydefault,thetopgroundspeedautomaticallyappearsinthe“What

was your top water speed?”eld.Ifagroundspeedisnotavailable,

thetopuncalibratedwaterspeedisusedinstead.Ifthenewspeedis

correct,highlightOK,andpressENTER.Ifyouwanttomanuallyenter

acalibration,pressENTERonthespeedeld,enteranewspeed,and

pressENTER.

Graph Sub Tab

Use the Graph sub tab to select the color scheme, sh symbols, and scale.

The available Graph sub tab options are:

•

Color Scheme—sets the colors for the Sonar and Flasher Pages.

•

Fish Symbols—sets how the Sonar Page interprets suspended targets

and background information. If you select a sh symbol, the

GPSMAP 3006C/3010C identies some returns for you by replacing

them with sh symbols (in large, medium, and small sizes based on the

size of the sonar return). If you are using dual beam, sh symbols from the

narrow beam (directly underneath your boat) are solid, and the returns from

the wide beam (out to the sides of your boat) are hollow.

the Sonar Page does not interpret the sonar return data.

Suspended targets appear as symbols. No background

information appears

Same as previous with the target depth shown.

Suspended targets appear as symbols. Background information

appears, making the distinction between sh and structure easier.

Same as previous with target depth shown.

• Scale

—controls the appearance of the depth scale shown vertically along

the right side of the graph. You can congure the depth scale to appear in

one of four different ways: as an Overlay, in the Corners, Basic, or No

Scale.

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Garmin GPSMAP 3010C User Manual Page 92