User manual - JG Technologies

14.10 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:
Fishfinder marker context menu
The fishfinder marker function includes a context menu which
provides marker information and menu items.
1 2 3
4 5 6 7
Screen item
Description
1 Depth reading — current depth of seabed.
D12222-1
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.
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.
The fishfinder marker context menu can be accessed by:
• Highlighting the marker lines using the Joystick and pressing
the Ok button, or
• Selecting and holding on the marker lines on screen —
Hybridtouch multifunction displays only.
The context menu provides the data for the position of the marker:
• Range
• Depth
The context menu also provide the following menu items:
• Place Waypoint
• Move Marker
• Erase Marker
The menu items can be accessed:
• using the Rotary Control and Ok button, or
• selecting the menu item on screen — Hybridtouch multifunction
displays only.
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.
Note: The VRMs used in the fishfinder application are unrelated
to the VRMs used in the radar application.
166 e7 / e7D / e95 / e97 / e125 / e127 / c95 / c97 / c125 / c127