Furuno CH-37 - Manual (Page 50)

3-6
3.7 Horizontal, Vertical and Event Markers
(trackball operation)
The trackball functions to obtain the data (horizontal range and
depth) from own ship to the specified position on the screen
and, combined with the R/B and EVENT keys, switches the
Horizontal, Vertical and Event markers on/off.
Event
marker*
Horizontal
and Vertical
markers
1) Position the trackball marker on the desired location.
2) Press the EVENT key.
3) To erase the marker, place the trackball marker outside
the echo display area and press the EVENT key.
Note: CH-37 stores one event marker.
1) Position the trackball marker on the desired location.
2) Press the R/B key. The horizontal and vertical markers
appear and the distance to the intersection of the mark-
ers is indicated at the bottom left-hand side of the
screen.
3) To erase the marker, place the marker outside the echo
display area and press the R/B key.
Event marker*
Vertical marker
Horizontal marker
Echo display area
Distance to the intersection
of the markers.
* Requires navigation data.
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