Dead Reckoning; Depth Areas - Interphase Chart Master Chart Master 11 CVS+ User Manual

headway back to the courseline while also proceeding toward the destination
Waypoint.
Cultural Features
Any man-made topographic feature as built-up area, buildings, roads.
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).

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.
Default
It indicates the original factory setting for any menu selection. The default
values are set after a Master Reset (RAM Clear).

Depth Areas

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.
Depth Line
(Also called Bathymetric Line) It is the imaginary line connecting points of
equal water depth.
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.
DGPS = Differential GPS
Provides even greater positioning accuracy than standard GPS.
DPT = Depth from Trasducer
Water Depth below the Trasducer. The Distance from the Depth Transducer to
the ground.
DST = Distance
The geographical distance between two points on the map. It is possible to
select the unit among Nm, Sm and Km.
ETA = Estimated Time of Arrival
The predicted time of reaching a destination or Waypoint
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.
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.
Fix Status
It indicates the quality of the position fix signal.
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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