Garmin GPSMAP 4210 Owner's Manual - Page 57

Advanced Sonar Settings, Create Waypoint, Resume

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Using Sonar Advanced Sonar Settings To adjust advanced sonar settings, press MENU while viewing a sonar screen. Gain-control the sensitivity of the sonar receiver (Auto or, to adjust manually, Up or Down). To see more detail, increase the gain. If the screen is cluttered, decrease the gain. Pause Sonar-select to stop scrolling. Select Create Waypoint to save the location as a waypoint, and select Resume to continue scrolling in real time. For more information on waypoints, see page 25. Frequency-select how the frequencies appear on screen (200kHz, 50kHz, or Dual) when using a dual-frequency transducer. Zoom-zoom in to a section of the Full screen. The zoom is off (No Zoom) by default. Three other options are available: • 2x Zoom-twice the magnification. Select Up, Down, or Auto to set the depth range of the magnified area. • 4x Zoom-four times the magnification. Select Up, Down, or Auto to set the depth range of the magnified area. • Bottom Lock-lock the zoom window to the bottom. Select Up, Down, or Auto to set the depth range of the magnified area. Range-adjust the range of the depth scale on the right side of the screen (Auto, or to adjust manually, Up or Down). Sonar Setup-open the Sonar Setup screen (page 52). GPSMAP 4000 Series Owner's Manual 53 Using Sonar

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GPSMAP 4000 Series Owner’s Manual
²3
Using Sonar
U
SING
S
ONAR
Advanced Sonar Settings
To adjust advanced sonar settings, press
MENU
while viewing a sonar screen.
Gain
—control the sensitivity of the sonar receiver (
Auto
or, to adjust manually,
Up
or
Down
). To
see more detail, increase the gain. If the screen is cluttered, decrease the gain.
Pause Sonar
—select to stop scrolling. Select
Create Waypoint
to save the location as a waypoint,
and select
Resume
to continue scrolling in real time. For more information on waypoints, see
page 25
.
Frequency
—select how the frequencies appear on screen (
200kHz
,
50kHz
, or
Dual
) when using a
dual-frequency transducer.
Zoom
—zoom in to a section of the Full screen. The zoom is off (
No Zoom)
by default. Three other
options are available:
2x Zoom
—twice the magnification. Select
Up
,
Down
, or
Auto
to set the depth range of the
magnified area.
4x Zoom
—four times the magnification. Select
Up
,
Down
, or
Auto
to set the depth range of the
magnified area.
Bottom Lock
—lock the zoom window to the bottom. Select
Up
,
Down
, or
Auto
to set the depth
range of the magnified area.
Range
—adjust the range of the depth scale on the right side of the screen (
Auto
, or to adjust
manually,
Up
or
Down
)
.
Sonar Setup
—open the Sonar Setup screen (
page 52
).
•
•
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