FLIR RAYMARINE A75 WiFi - Sonar A-Scope Mode; Bottom Lock

1. Select Menu.
2. Select Display Mode.
3. Select Zoom so that Split is highlighted.
Selecting Zoom will switch between Split and Full.
Adjusting the sonar zoom factor
When the display mode is set to Zoom, you can
select a zoom factor or adjust it manually.
From the Sonar application, with the display mode
set to Zoom.
1. Select Menu.
2. Select Display Mode.
3. Select Zoom Factor.
4. Select a preset Zoom Factor (x2, x3, x4) or
select Manual
Once selection is made you will be returned to
the Display Mode menu.
5. If Manual is chosen select Manual Zoom
The manual zoom factor numeric adjust dialog is
displayed.
6. Adjust the setting to the required value.
7. Select Back or use the OK button to conrm the
setting.
Adjusting the position of the sonar zoomed area
When the Zoom display mode is selected, the
system automatically selects a zoom position so that
the bottom details are always shown in the lower
half of the screen. If required, you can reposition
the portion of the image to be zoomed so that an
alternative area is displayed.
From the Sonar application, with Zoom display mode
selected:
1. Select Menu.
2. Select Display Mode.
3. Select Zoom Position so that Man is selected.
Selecting the zoom position will switch between
Man and Auto.
4. Select Man Zoom Pos:.
The Zoom position numeric adjust control is
displayed.
5. Adjust the setting to the required value.
6. Select Back or OK to close the menu.
Sonar A-Scope mode
The A-Scope mode enables you to view a live (rather
than historical) image of the seabed and sh directly
below your vessel.
The standard sonar display shows a historical record
of sonar echoes. If required, you can display a live
image of the bottom structure and the sh directly
below the transducer by using the A-Scope feature.
The width of the bottom covered by the A-Scope
is indicated at the bottom of the window. A-Scope
provides a more precise and easier to interpret
indication of the target strength.
There are three A-Scope modes:
Mode 1 Mode 2 Mode 3
The A-scope
image is centred in
the window.
The left-hand side
of the Mode 1
image is expanded
to give a more
detailed view.
The A-scope
image angles
outward as signal
width increases
with depth.
The numbers displayed at the bottom when in
A-Scope mode indicate the approximate diameter (in
selected depth units) of the conical beam’s coverage
of the bottom.
Selecting A-Scope mode
From the Sonar application, with the A-Scope display
mode selected:
1. Select Menu.
2. Select Display Mode.
3. Select Select Mode:.
4. Select A-Scope.
5. Select A-Scope: to display the list of A-Scope
modes.
6. Select the required mode.
Bottom Lock
The Bottom Lock display mode applies a lter which
attens the image of the bottom and makes any
objects on or just above it easier to see. This feature
is particularly useful for nding sh that feed close
to the bottom.
Adjusting the range of the bottom lock image allows
you to view more bottom details. You can also
reposition the image on the screen to anywhere
between the bottom of the window (0%) and the
middle of the window (50%) using the Bottom Shift
control.
Sonar (Fishnder) application
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