Seiwa Tigershark Plus - Manual (Page 63)

65 User Manual
file must have a unique name, ideally one that describes its contents. Filenames
are kept in a directory on each User C-CARD.
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Fix
It is the current position of the vessel provided by the GPS (connected to the
chart plotter or built-in) or other positioning systems.
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Fix Status
It indicates the quality of the position fix signal.
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Fuel Consumption Rate
It represents the estimated fuel consumption rate (per hour) of an engine
boat referred to its relative estimated cruising speed.
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GNSS = Global Navigation Satellite System
It is the name used to indicate any single or combined navigation system
based on satellites. The current available satellites systems are: GPS, GLONASS
and the combined GPS and GLONASS.
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Goto
It is the function that defines the destination point and activates the naviga-
tion to it. The destination can be placed on any location of the map, an existing
Mark point or on a predefined Route.
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GPS = Global Positioning System
It is a satellite based navigation system operated by the US Department of
Defence. It gives the navigator a position 24 hours a day, 365 days a year
under any weather conditions.
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HDG = Heading
The horizontal direction in which a ship actually points or heads in any mo-
ment (see also COG).
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HDOP = Horizontal Dilution Of Precision
It is a parameter indicating the precision of the positioning system (GPS). The
smaller HDOP value indicates higher position accurately.
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Home mode
All operations refer to the ship's position.
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Landmarks
Landmarks are any prominent object such as monument, building, silo, tower,
mast, ..., on land which can be used in determining a location or a direction.
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Latitude
The angular distance North or South of the equator measured by lines encir-
cling the earth parallel to the equator in degrees from 0° to 90°.
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LAT/LON
Coordinate system using Latitude and Longitude coordinates to define a posi-
tion on earth.
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Lat/Lon Grid
It is the grid of parallels (of Latitude) and meridians (of Longitude) drawn on
the map.
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LOG Speed
Speed of the vessel relative to the water, provided by an instrument with a sub-
merged transducer for measuring the distance/speed travelled by the vessel.
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Longitude
The angular distance East or West of the prime meridian (Greenwich meridian)
as measured by lines perpendicular to the parallels and converging at the
poles from 0° to 180°.
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Loran
It is a positioning system which determines the current position of the vessel
by measuring the difference in the times of reception of synchronized radio
pulse signals transmitted by two or more fixed stations.