Satmap active12 Guide de l'utilisateur télécharger pdf (Page 97)

© Satmap Systems Ltd

© Satmap Systems Ltd 2014

97

GLONASS. A space-based navigation system

comparable to the American GPS system.

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.

Grid. A group of square-shaped AOIs (Areas

of Interest) in a large square/grid formation.

Used to split an area into searchable pieces

by overlaying a 10 x 10 square grid onto a map

(each AOI covering 300m x 300m).

Grid Magnetic Angle. The horizontal angular

difference between Grid North and Magnetic

North. It is this angle which needs to be applied

when converting between magnetic and grid

bearings.

Grid North. The direction of a grid line which is

parallel to the central meridian on the national

grid.

Heading. Direction you are traveling.

Hibernate mode. An ultra low power state

giving signicantly extended battery life and a

rapid satellite acquisition.

Inactive route. Shown as a gray highlighted line

on the map (only if you have made it visible).

IOI. An Item of Interest. A non geo-referenced

document including digital information saved

on the unit that contains no latitude or longitude

data. Used to reference instructions, or contain

a graphic showing information. Can be created

directly on the unit as a simple text description

with details of the IOI shown on the description

screen.

Knot. One nautical mile per hour.

Landranger. 1:50 000 Ordnance Survey map.

LOI. A Line of Interest. Allows you to plot a

line consisting of multiple waypoints joined

together, instead of a single POI (Point of

Interest). Cannot be followed or activated like

a route, but used to represent boundaries or

alternative routes and to customize your map.

Magnetic North. The direction indicated by a

magnetic compass. Magnetic North moves

slowly and is currently West of Grid North in

Great Britain.

Marker. A red ag on the map from which you

can measure distance and bearing from any

other point on the map.

Meridian. A line of longitude.

MGRS. Military Grid Reference System, used

by NATO countries. It is derived from the UTM

grid system but uses a different labelling

convention. It does not describe a point,

but rather an area.

Mil-radians. The military use mil-radians (short

for milli-radians) because breaking down a

circle into 6400 mil-radians rather than 360

degrees allows greater accuracy.

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