Lowrance electronic GlobalMap 100 - Manual (Page 49)

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Use the left or right arrow keys to select the number in
the current time that you want to change. Use the up or
down arrow keys to change the number. Press the ENT
key to save the change, the EXIT key to erase the menu
without changing it.
Units of Measure
You can view data in three different formats: statute, nautical, and metric.
The default is statute. The chart below shows the settings for each.
Statute Nautical Metric
Distance ....... miles ................... nautical miles ... kilometers
Speed ........... miles per hour ..... knots ................ kilometers per hour
Altitude ......... feet ..................... feet ................... meters
The unit will also show bearing in degrees true or mag-
netic, and the clock in 12 hour (a.m./p.m.) or 24 hour
formats. To change a unit of measure, first select
“CHANGE UNITS” from the System Setup menu. High-
light the desired selection, then press the left or right
arrow key. You can change any or all of the settings on
this page. When you’re finished, press the EXIT key.
NMEA / DGPS
This product transmits data through the power/data port in the back of the
unit using NMEA 0183 format, version 1.5 or 2.0. The 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.
All wiring connections to this GPS receiver are made through the power