Navman MULTI 3100 Installation And Operation Manual - page 10
10
NAVMAN
MULTI 3100 Installation and Operation Manual
5 Depth, keel offset, too deep alarm, too shallow alarm
Depth and keel offset
The displayed depth is the distance from the transducer
on the boat to the bottom of the water, plus or minus an
offset which is called the keel offset:
A positive keel offset displays depth as
measured from a point above the transducer.
For example, if you set the offset as the
distance from the transducer to the surface, it
Deep
alarm
value
Alarm
is on
Shallow
alarm
value
Alarm
is off
will display the depth from the surface to the
bottom of the water.
A negative keel offset displays depth as
measured from a point below the transducer.
For example, if you set the negative offset as
the distance from the transducer to the bottom
of the keel, it will display the depth from the
bottom of the keel to the bottom of the water.
5-1 Set depth units
The units can be METERS, FEET or FATH:
Press
until DEPTH is displayed, then hold
until the units change; if necessary, hold
until the units change again.
5-2 Set too deep alarm
The too deep alarm sounds if the alarm is turned on
and the depth becomes equal to or more than the
too deep alarm depth. To mute the alarm, press
.
To set the too deep alarm:
1
Hold
for two seconds to display the Too
Deep Alarm screen:
2
To change the alarm depth, press
or
.
3
To turn the alarm on or off, press
.
4
Press
.
5-3 Set too shallow alarm
The too shallow alarm sounds if the alarm is turned
on and the depth becomes equal to or less than the
too shallow alarm depth. To mute the alarm, press
. To set the too shallow alarm:
1
At the Too Deep Alarm screen, hold
for two
seconds to display the Too Shallow Alarm screen:
2
To change the alarm depth, press
or
.
3
To turn the alarm on or off, press
.
4
Press
.
5-4 Anchor watch
To set an anchor watch, set the too shallow alarm to
slightly less than the current depth and set the too
deep alarm to slightly more than the current depth.
Allow for tide changes.
5-5 Set keel offset
Keel offset is described above. The range is ± 2.9 m
(± 9.6 ft, ± 1.6 fathoms):
1
Press
+
several times until the Keel
Offset screen is displayed:
2
Press
or
to change the keel offset.
3
Press
.
Keel
offset
(negative)
Positive value
Keel offset
Negative value
Transducer
Depth of transducer
Water surface
Keel offset
Note: The boat illustrated uses a through hull transducer