Operation Manual
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User Manual
DSC = Digital Selective Calling
Method of establishing a VHF radio call; it is used to announce urgent maritime safety information broad-
casts. This system allows mariners to instantly send Distress Call or/and Position Request to the other vessels
equipped with a DSC transceiver within range of the transmission.
Event
User Point that refers to the ship's position. It is simply a way of marking where the boat is.
File
Collection of information (of the same type) stored on a User C-CARD. Each file must have a unique name,
ideally one that describes its contents. Filenames are kept in a directory on each User C-CARD.
Goto
Sets a particular mark on the map, called Target or Destination.
GPS = Global Positioning System
Satellite based navigation system operated by the US Department of Defense. It gives the navigator a posi-
tion 24 hours a day, 365 days a year under any weather conditions .
HDG = Heading
Horizontal direction in which a ship actually points or heads in any moment (see also COG).
HDOP = Horizontal Dilution Of Precision
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
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
Angular distance East or West of the prime meridian (Greenwich meridian) as measured by lines perpen-
dicular to the parallels and converging at the poles from 0° to 180°.
Loran
The Loran Chains are groups of transmitting stations that use timed radio pulse transmissions.
Magnetic Deviation
Angle between the Magnetic North and the Compass North.
Magnetic Variation
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.
MOBILARM
Automated crew monitoring system dedicated to monitoring onboard crew by maintaining a constant link
between the crew member and the boat. The instant a man over-board event happens, an automatic alarm is
sounded, and the vessels position is logged.