11.10 Depth and distance with the
fishfinder
You can use VRM markers and depth lines to help you determine
depths and distances in the fishfinder display.
The fishfinder display provides a number of features to help you
determine depths and distances. These features are illustrated and
described in more detail below:
1
3
2
4
5
7
6
D
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Screen item
Description
1
Depth reading
— current depth of seabed.
2
Depth Target ID
— depths are displayed against
recognized targets. The sensitivity of these IDs is
directly linked to the Fish Alarm sensitivity; the greater
the fish alarm sensitivity, the greater the number of
labelled returns.
3
Cursor Depth
— this is the depth of the cursor
position.
Screen item
Description
4
Vertical VRM marker
— indicates the distance behind
your vessel.
5
Horizontal VRM marker
— indicates the depth of the
target.
6
Depth lines
— horizontal dashed lines drawn at
regular intervals to indicate the depth from the surface.
7
Depth markers
— these numbers indicate depth.
Measuring depth and distance with VRM
You can use a Variable Range Marker (VRM) to determine an
object’s depth and distance behind your vessel. These markers
consist of a horizontal (depth) line and a vertical (distance) line,
each of which are marked with the appropriate measurement.
From the fishfinder application:
1. Select
Menu
2. Select
Scroll
so that Pause is highlighted (This may make it
easier to position the marker).
Selecting Scroll will switch the scroll between Pause and
Resume.
3. Select the desired location on screen.
4. Press the
Ok
button or select and hold the desired location to
open the fishfinder context menu.
5. Select
Place marker
.
6. Press
Ok
or select and hold on the position of the marker to
open the fishfinder context menu.
7. Select
Move marker
.
8. Position the marker at the desired location.
9. Press the
Ok
button to position the marker at the required
position.
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