Raymarine DSM250, Owner'S Handbook Manual

Page: 83 / 122

Chapter 5: Basic Display Controls 5-23
➤
To display the A-Scope image:
1. Press the
A-SCOPE
soft key. The display is split vertically, with the
A-Scope image in the right hand window and the scrolling bottom
image in the left hand window.
2. Press the
A-SCOPE MODE soft key to
select one of the three modes
for A-Scope, as demonstrated in Figure 5-9 :
i. Mode 1, in which the A-Scope image is angled outward as the
signal width (indicated with dotted lines) increases with
depth.
ii. Mode 2, in which the image expands to take up the entire
A-Scope window, providing greater resolution.
iii. Mode 3, in which only the left hand side of the image dis-
played in Mode 2 expands to the entire A-Scope window. This
mode provides the greatest resolution.
3. Press
ENTER
to accept your selection.
Note: If the Bottom Lock or Zoom image is displayed, selecting A-
Scope automatically switches
OFF
Bottom Lock and Zoom.
If you have split frequency selected, the A-Scope image is displayed in
both frequency windows.
➤
To remove the A-Scope image:
1. Press the
A-SCOPE soft key.
2. Press the
A-SCOPE ON OFF
soft key to toggle off A-Scope.
3. Press
ENTER
.
A-SCOPE
A-SCOPE
MODE
1 2 3
A-SCOPE
OFF ON