Si-tex COLOR MAX 15, User Manual

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70 User Manual
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Course Line (Time Line)
The Course Line is a graphical indication of the direction in which the Vessel is
heading. The Course Line origin is the vessel’s position so the time line move-
ment is synchronized with the vessels Icon. Course Line "course" is given by
the value of COG (Course Over Ground) and its length is proportional to the
SOG (Speed Over Ground).
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CTS = Course To Steer
The optimum direction the boat should be steered in order to efficiently make
headway back to the course line while also proceeding toward the destination
Waypoint.
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Cultural Features
Any man-made topographic feature as built-up area, buildings, roads.
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Data Window Mode
To customize the Text Area layout among Full Screen, Text Area with 3 boxes
and Text Area with 6 boxes
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Datum
The Latitude and Longitude lines printed on any map are based on certain
models of the shape of the earth: these models are called Datum or Coordi-
nate Systems. There are many different Datum in use, each one gives differ-
ent Lat/Lon positions for an identical point on the surface of the earth (see
also Map Datum and Fix Datum).
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Dead Reckoning
It is the procedure to determine the current position of a vessel by applying to
the last known position the way that has been made (since the last known
position was received). This procedure is normally based on the last received
GPS position, Speed and Course or to the last received GPS position, Log
Speed and Heading.
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Default
It indicates the original factory setting for any menu selection. The default
values are set after a Master Reset (RAM Clear).
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Depth Area
Depth Areas are the sea areas included in the user selectable range of mini-
mum and maximum depth limits. The sea area that is beyond the selected
range is filled by an uniform white color, the sea area that is inside the se-
lected range is filled by ordinary multicolor shading. The Spot Soundings and
Depth Contours are displayed on the range only.
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Depth Line
(Also called Bathymetric Line) It is the imaginary line connecting points of
equal water depth.
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Destination
In order to tag on the chart the point, towards which the ship is Heading, you
can use a special mark, called destination. When the destination is placed, all
navigation data referred to this point.
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DGPS = Differential GPS
Provides even greater positioning accuracy than standard GPS.
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DPT = Depth from Trasducer
Water Depth below the Trasducer. The Distance from the Depth Transducer to
the ground.
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DST = Distance
The geographical distance between two points on the map. It is possible to
select the unit among Nm, Sm and Km.
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ETA = Estimated Time of Arrival
The predicted time of reaching a destination or Waypoint