Nmea/Dgps - Lowrance GlobalNav 310 Installation And Operation Instructions Manual

The GlobalNav 310 can use the military
grid reference system (MGRS). It uses
two grid lettering schemes, which are
referred to as standard and alternate
MGRS on the GlobalNav 310. Your po-
sition and datum in use determines
which one to use. In general, if the da-
tum you're using is valid for your present
position, then use the standard MGRS,
otherwise use the alternate MGRS.
Press the up or down arrow keys to high-
light the desired position format. Press
the EXIT key to both select the format
and erase the position format menu.
NMEA / DGPS
The GlobalNav 310 transmits data through the data port in the back of
the unit using NMEA 0183 format, version 1.5 or 2.0. This data is used by
other electronic devices such as marine autopilots for position and steer-
ing information.
DGPS on the other hand, is a data input. DGPS is an acronym for Differ-
ential Global Positioning System. Currently, it relies on a system of ground-
based transmitters that send correction signals to small DGPS receivers.
DGPS gives you more accurate positions than is otherwise possible.
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