Using A-Scope - Raymarine hsb2 PLUS Owner's Handbook Manual

Chapter 3: Getting Started & Adjusting the Display
➤ To reposition the bottom lock image:
1. Use the trackpad to move the cursor to the bottom image until the text BL is
BL
displayed near the cursor.
2. Press ENTER, a horizontal line appears, indicating the cursor is active. Use
the trackpad to move the line to the required bottom lock image position.
3. Press ENTER to reposition the bottom lock image, or CLEAR to cancel the
operation.

Using A-Scope

The scrolling bottom display provides a historical record of sonar echoes. 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. At the lower end of the window, A-Scope also displays
the patented Bottom Coverage width indication.
➤ To display the A-Scope image:
1. Press the A-SCOPE soft key. The display is split vertically, with the A-Scope
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
MODE
A-Scope, as demonstrated in Figure 3-10:
1 2 3
i. Mode 1, in which the A-Scope image is angled outward as the signal
ii. Mode 2, in which the image expands to take up the entire A-Scope win-
iii. Mode 3, in which only the left hand side of the image displayed in Mode
3. Press ENTER to accept your selection.
Note: If the Bottom Lock or Zoom image is displayed, selecting A-Scope auto-
matically switches
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.
A-SCOPE
OFF ON
3. Press ENTER.
width (indicated with dotted lines) increases with depth.
dow, providing greater resolution.
2 expands to the entire A-Scope window. This mode provides the great-
est resolution.
OFF
Bottom Lock or Zoom.
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