Garmin GPSMAP 441s Owner's Manual - Page 67

Advanced Sonar Settings, Auto 4x Zoom - dual frequency transducer

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Using Sonar • Whiteline-highlights the strongest signal from the bottom to help identify its hardness or softness. ◦ Off (default)-turns off whiteline. ◦ High-the most sensitive setting. Almost all strong returns are highlighted in white. ◦ Medium-many strong returns are highlighted in white. ◦ Low-the least sensitive setting. Only the strongest returns are highlighted in white. Color Scheme-select White or Blue. This affects the background on all sonar screens, but does not change the Temp Log screen or the Depth Log screen. From the paused screen, press MENU > Resume Sonar to continue scrolling. Range-adjust the range of the depth scale on the right side of the screen (Auto, or to adjust manually, Manual Range). Gain-controls the sensitivity of the sonar receiver (Auto, or to adjust manually, Manual). To see more detail, increase the gain. If the screen is cluttered, decrease the gain. Frequency-when using a dual frequency transducer, select how the frequencies appear on-screen (200kHz, 50kHz, Dual, or Auto). Zoom-zoom in to a section of the full screen. The zoom is off, or set to No Zoom by default. Four options are available: Advanced Sonar Settings To adjust advanced sonar settings, press MENU while viewing a sonar screen. • No Zoom-turns zooming off. • Auto 2x Zoom-automatically tracks along the bottom at twice the magnification. Pause Sonar-stops the scrolling of the sonar screen. To mark a waypoint at a selected depth: 1. While viewing a sonar screen, press MENU > Pause Sonar. 2. Use the Rocker to position the pointer over the fish or structure you want to mark. 3. Press SELECT. • Auto 4x Zoom- automatically tracks along the bottom at four times the magnification. • Manual Zoom-set the depth range of the magnified area manually. Select Depth and then use the Rocker > Select to set the depth range of the magnified area. Select Level and then use the Rocker > Select to increase or decrease the magnification of the magnified area. • Bottom Lock-locks the zoom window to the bottom. GPSMAP 400/500 Series Owner's Manual 61

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GPSMAP 400/500 Series Owner’s Manual
³±
Using Sonar
Whiteline
—highlights the strongest signal from the bottom to
help identify its hardness or softness.
Off
(default)—turns off whiteline.
High
—the most sensitive setting. Almost all strong returns
are highlighted in white.
Medium
—many strong returns are highlighted in white.
Low
—the least sensitive setting. Only the strongest returns
are highlighted in white.
Color Scheme
—select
White
or
Blue
. This affects the background
on all sonar screens, but does not change the Temp Log screen or the
Depth Log screen.
Advanced Sonar Settings
To adjust advanced sonar settings, press
MENU
while viewing a
sonar screen.
Pause Sonar
—stops the scrolling of the sonar screen.
To mark a waypoint at a selected depth:
1. While viewing a sonar screen, press
MENU
>
Pause Sonar
.
2. Use the
Rocker
to position the pointer over the fish or structure
you want to mark.
3. Press
SELECT
.
•
◦
◦
◦
◦
From the paused screen, press
MENU
>
Resume Sonar
to
continue scrolling.
Range
—adjust the range of the depth scale on the right side of the
screen (
Auto
, or to adjust manually,
Manual Range
).
Gain
—controls the sensitivity of the sonar receiver (
Auto
, or to
adjust manually,
Manual
). To see more detail, increase the gain. If
the screen is cluttered, decrease the gain.
Frequency
—when using a dual frequency transducer, select how
the frequencies appear on-screen (
200kHz
,
50kHz
,
Dual
,
or
Auto
).
Zoom
—zoom in to a section of the full screen. The zoom is off, or
set to
No Zoom
by default. Four options are available:
No Zoom
—turns zooming off.
Auto 2x Zoom
—automatically tracks along the bottom at twice
the magnification.
Auto 4x Zoom
— automatically tracks along the bottom at four
times the magnification.
Manual Zoom
—set the depth range of the magnified area
manually. Select
Depth
and then use the
Rocker
>
Select
to set
the depth range of the magnified area. Select
Level
and then use
the
Rocker
>
Select
to increase or decrease the magnification of
the magnified area.
Bottom Lock
—locks the zoom window to the bottom.
•
•
•
•
•