Glossary - satmap active 20 Full User Manual

22. Glossary

Active map.
The map on a card which is in use
(multiple maps can be on one SD card).
Active route.
Shown as a highlighted yellow
or blue line to follow on the map with red arrows
between waypoints.
AOI.
An Area of Interest. Consists of a series of
points making up an area of any size or shape. Can
be used to measure an area on a map, mark various
areas of interest, or as an alternative to the circular
POI warning radius.
Arbitrary reference point (for AOIs/LOIs/Grids)
Automatically generated (set) point within or on an
AOI/LOI/Grid. It is used as a reference point in the
following instances:
• As a GoTo point
• As a 'POI' in data boxes
• When using the Pointer
• When using the Centre on Map button
This reference point can be moved to any new
Edit Location by Map
location by using the
Asc.
Abbreviation for ascended height.
Ascents.
Positive changes in elevation.
Atomic clock.
A type of clock that uses microwave
signals emitted by electrons as its timekeeping
element. It is the most accurate time standard and
is used to control the frequency of GPS satellite
signals.
Bearing.
Direction from one object to another.
CEP (Circular Error Probability).
the radius of a circle containing 50% of the GPS
readings.
Cross Track Error.
between a planned route and your location.
Data Box.
A white overlay box that appears in the
lower half of the map screen. Shows customized
information about your trip, environment and map
objects. Available as a 2 or 4 box layout.
Descents.
Negative changes in elevation.
EGNOS.
The
Navigation Overlay Service has been developed
by the European Space Agency (ESA) for safety of
air navigation. It is part of the Galileo project. When
a signal is available (which is only in the south of
England and mainland Europe), this signal improves
the accuracy of signals from the GPS system.
Electronic compass.
to calculate accurate compass bearings whilst
stationary.
ETA.
Estimated Time of Arrival. The ETA is
calculated from the average moving speed if it is
option.
available (see Trip Log). Otherwise the set speed
is used. For example if you have no lock but the
unit previously recorded an average moving speed
which has not been cleared from the trip log, the
ETA will be based on this average moving speed.
Explorer.
1:25 000 Ordnance Survey map.
Galileo.
A planned global navigation satellite
system, being built by the European Union and
European Space Agency as an alternative for
the US Global Positioning System (GPS) and the
Russian GLONASS system. The project is expected
Determines
The difference in distance
European Geostationary
Uses magnetic fields
103
to be completed in 2013.
Geocaching.
An outdoor treasure hunt activity
using a GPS to locate hidden
('geocaches'). Often called a "game of high-tech
hide and seek", coordinates, along with other details
of the location, are posted online. Download files
onto your computer from geocaching.com and use
SatSYNC to import them to the Active 20.
Geotagging.
Photos are labeled or 'tagged' to show
where they were taken. Date/time information from
the photos is matched with the location information
from the GPS unit. (Use the geotagging application
in SatSYNC).
GLONASS.
A space-based navigation system
comparable to the American
Developed by the former Soviet Union and now
operated for the Russian government by the
Russian Space Forces.
GoTo point.
A set point which acts as a target. It
is on a straight line from your current location and
the route (yellow or blue highlighted route with red
arrows between current location and GoTo point).
GMT (Greenwich Mean Time).
The local time at
the 0 meridian passing through Greenwich.
GPS. The Global Positioning System is the only fully
operational Global Navigation Satellite System in
the world. Created in the US it utilizes a constellation
of 24 Medium Earth Orbit satellites that transmit
precise signals. The system enables a GPS receiver
to determine its time, location, speed and distance.
GPS 'compass'
Relies on a GPS signal to
determine the direction of travel from two locations
and calculate accurate compass bearings whilst
moving. Need a GPS lock.
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