DEPTH 3100 Installation and Operation Manual
Keel offset
4 Systems of several instruments
Several NAVMAN instruments can be connected
together to share data. There are two ways of
connecting instruments together, NavBus or NMEA.
4-1 NavBus
NavBus is a NAVMAN proprietary system that allows
systems of multiple instruments to be built using a
single set of transducers. When instruments are
connected by NavBus:
If you change the units, alarms or calibration in
one instrument, then the values will
automatically change in all other instruments
of the same type
Each instrument can be assigned to a group of
instruments (see section 6-2, step 2). If you
change the backlight in an instrument in group
1, 2, 3 or 4 then the backlight will automatically
change in the other instruments in the same
group. If you change the backlight in an
instrument in group 0 then no other
instruments are affected.
If an alarm sounds, mute it by pressing on
any instrument which can display that alarm.
NavBus and the DEPTH 3100
If the DEPTH 3100 does not have a depth transducer
fitted then the unit will automatically take depth
readings from another instrument, via NavBus, if the
data is available. For more information, refer to the
NavBus Installation and Operation manual.
Note: If a transducer is not fitted to the unit and the
corresponding external data is not available then the
displayed value will be dashes (— —).
4-2 NMEA
NMEA is an industry standard, but is not as flexible
as NavBus as it requires dedicated connections
between instruments. Depth data is output by the
DEPTH 3100 and can be read and displayed by the
NAVMAN REPEAT 3100 or other NMEA instrument.
3-4 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.
3-5 Set keel offset
Keel offset is described above. The range is ± 2.9 m
(± 9.6 ft, ± 1.6 fathoms):
1 Press + to display the Keel Offset
2 Press or to change the keel offset.
3 Press .
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