Depth, Keel Offset, Too Deep Alarm, Too Shallow Alarm; Set Depth Units; Set Too Deep Alarm; Set Too Shallow Alarm - 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
Keel offset
Water surface
Depth of transducer
Note: The boat illustrated uses a through hull transducer

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
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
seconds to display the Too Shallow Alarm screen:
10
2
.
3
4

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.
Deep
Allow for tide changes.
alarm

5-5 Set keel offset

value
Keel offset is described above. The range is ± 2.9 m
(± 9.6 ft, ± 1.6 fathoms):
Alarm
is on
or .
.
1
2
for two
3
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.
Transducer
To change the alarm depth, press
To turn the alarm on or off, press
Press .
Press + several times until the Keel
Offset screen is displayed:
Press or to change the keel offset.
Press .
MULTI 3100 Installation and Operation Manual
Keel offset
Positive value
Negative value
Shallow
alarm
value
Alarm
is off
or .
.
Keel
offset
(negative)