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User Manual
HDG = Heading
The horizontal direction in which a ship actually points or heads in any moment (see also COG).
HDOP = Horizontal Dilution Of Precision
It is the index for position-fixing accuracy. The smaller the HDOP value, the more accurately the
position can be fixed
Home
In this operating mode (called also Navigate mode) all operations refer to the ship's position.
Latitude
The angular distance North or South of the equator measured by lines encircling the earth parallel to
the equator in degrees from 0° to 90°.
LAT/LON
Coordinate system using Latitude and Longitude coordinates to define a position on earth.
LOG
Speed of the vessel relative to the water.
Longitude
The angular distance East or West of the prime meridian (Greenwich meridian) as measured by lines
perpendicular to the parallels and coverging at the poles from 0° to 180°.
Loran
The Loran Chains are groups of transmitting stations that use timed radio pulse transmissions.
Magnetic Deviation
The angle between the Magnetic North and the Compass North.
Magnetic Variation
The angle between the magnetic and geographic meridians at any place, expressed in degrees West or
East to indicate the direction of magnetic North from true North. It changes from point to point, and
(at the same point) with time.
Mark
Reference points related to cursor position.
Natural Features
Any topographic feature formed by the action of natural processes: coastlines, relief, glaciers, ....
Navigate (mode)
Operating mode (called also Home mode) all operations refer to the ship's position.
NMEA-0183
The NMEA-0183 Data Interface Standard was developed by the National Marine Electronics Associa-
tion of America. It is an international standard that enables equipment from many different manufac-
tures to be connected together and to share information.
Pictures and Diagrams
The MAX data format allows assigning one or more image to any cartographic object. These Pictures
are typically used to facilitate the identification of cartographic objects or places around the map: they
can be the landscape layout nearby a harbor, the shape of a bridge or of a buoy etc.
On some objects, such as bridges, the image associated can represent the Diagram representing the
shape of the objects and the various characteristics (length, heigh, type of bridge etc.).
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