Range - Raymarine a Series Installation And Operation Instructions Manual

Transducer frequency
The same target will appear differently when using different
transducer frequencies. The lower the frequency the broader
the mark.
Recovering lost bottom
If the seabed floor (bottom) is lost then follow the steps below
to recover the bottom depth.
From the fishfinder application:
1. Ensure your vessel is in clear undisturbed water.
2. If range is set to Manual, adjust the range to the known,
charted depth of your location. or
3. If range is set to Auto then switch the range to manual and
adjust the range to the known, charted depth of your location.
4. Once bottom has been regained you can switch range mode
back to Auto.
192

17.8 Range

The Range function enables you to define the range of depth
that you see in the Fishfinder application. In Auto Range, the
Fishfinder application automatically adjusts the range to ensure
the water column and bottom are always displayed. In Manual
Range, you can adjust the range displayed on-screen to suit
your needs.
The table below shows examples of the Range function used
with different sonar types.
Traditional and CHIRP
channels
Auto Range
Manual

Range

Changing the depth range
You can choose from either:
• Automatic adjustment whereby the display automatically
shows the shallowest required range.
• Manual adjustment of the depth range, up to the maximum
depth allowed by the Fishfinder application.
From the Fishfinder application menu:
1. Select Range.
2. Select Range to switch between Auto and Man.
3. With manual mode selected you can now adjust the depth
range shown on-screen.
Note: With the Range menu displayed you cannot use the
Rotary Control to range in and out. To use the Rotary
control to range in and out, first close the Range menu.
Range in and out
The method of ranging in and out of the Fishfinder application is
dependent upon the multifunction display variant being used.
The table below shows the Range controls available for each
display variant.
Controls
Rotary Control
Range in and Range
out buttons
Slide the screen Up or
Down
DownVision TM channel
Multifunction
displays
• c Series
• e Series
• RMK-9 keypad
• c Series
• e Series (excluding
e7 and e7D
• RMK-9 keypad
• a Series
• e Series
• gS Series
a Series / c Series / e Series