Chapter 6: The Fishfinder 139
• Depth reading - your current depth. The size and position of this readout can be
changed in the Fishfinder display Setup menu (see
page 143
).
• Depth lines - horizontal dashed lines drawn at regular intervals to indicate the
depth from the surface. These are switched on/off in the Fishfinder Display Setup
menu (see
page 143
).
• Depth Target ID - depths noted 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. These targets are switched
on/off in the Fishfinder Display Setup menu (see
page 143
).
• Cursor depth - the depth and the distance from your boat marked by the cursor,
is indicated in the data bar at the top of the screen. This performs in a similar way to
a VRM, but without lines.
• VRMs - to indicate the distance behind your boat and the depth below of selected
objects.
Note:
When multiple fishfinder windows are open, we recommend you have the
depth reading displayed in at least one window.
Measuring depth and distance with VRM
You can use a Variable Range Marker (VRM) to determine the depth and distance-
behind-boat of an object. These markers consist of a horizontal (depth) line and a
vertical (distance-behind-boat) line; each of which are marked with the appropriate
measurement and are controlled individually.
Note:
VRMs set up in Fishfinder are unrelated to those set up in Radar.
74
70
67
74
49
46
44
1768ft
42.2ft
63
74
75
VRM 1
ON OFF
RANGE
0.787nm
DEPTH
44.7ft
F1: 200 kHz
SHALLOW
Freq1: 200 kHz-Auto
Freq2: None
VRM marker
indicating
depth of target
Depth
reading
Depth line
Depth
markers
Depth
target ID
Cursor
(depth indicated
in data bar)
VRM marker
indicating
distance
behind boat
D10411-1
81244_4.book Page 139 Thursday, January 31, 2008 1:53 PM
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