Raymarine DSM25 - A-Scope

36 DSM25 Owner’s Handbook
3.7 A-Scope
Use the A-Scope screen to show raw sonar data directly from the transducer
beam. This gives you a “real time” image of fish and bottom structure directly
below the transducer. This function is very useful in showing the strength of the
echo returned from a fish. 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.
Select one of the three modes for A-Scope:
• MODE 1, in which the image takes up the entire A-Scope window.
• MODE 2, in which only the left side of the image displayed in MODE 1 expands
to the entire A-Scope window. This mode provides the greatest resolution.
• MODE 3, in which the A-Scope image is angled outward as the signal width
(indicated with dotted lines) increases with depth.
The default setting is OFF.
Note: If the Bottom Lock or Zoom image was displayed, selecting A-Scope automatically
switches OFF Bottom Lock and Zoom.
D8329-2
A-SCOPE
ON OFF
A-SCOPE MODE
1 2 3
43
44
44
44
43
47
47
42
ft
34
36
A-Scope MODE 1 MODE 2 MODE 3
D7912-1
43 9
A-SCOPE
ON OFF
A-SCOPE
ON OFF
A-SCOPE MODE
1 2 3
A-SCOPE MODE
1 2 3
200 kHz
20
0
40
60
14.2 14.2 14.2
81254.book Page 36 Monday, March 6, 2006 2:29 PM