Cultural Features; Dead Reckoning; Depth Areas; Depth Line - VDO MAP 7w Plus GPS User Manual

COG = Course Over Ground
♦
Direction of the path over ground actually followed by a vessel.
CTS = Course To Steer
♦
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.

Cultural Features

♦
Any man-made topographic feature as built-up area, buildings, roads.
Datum
♦
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 Coordinate Sys-
tems. There are many different Datum in use, each one gives different Lat/
Lon positions for an identical point on the surface of the earth.

Dead Reckoning

♦
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
♦
Indicates the original factory setting for any menu selection. The default val-
ues are set after a Master Reset (RAM Clear).

Depth Areas

♦
Sea areas included in the user selectable range of minimum 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 selected range is filled by
ordinary multicolor shading. The Spot Soundings and Depth Contours are dis-
played on the range only.

Depth Line

♦
(Also called Bathymetric Line) 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 Transducer
♦
Water Depth below the Transducer. Distance from the Depth Transducer to the
ground.
DST = Distance
♦
Geographical distance between two points on the map.
Easy Link
♦
VDO-specific interface to actuate slave indicators.
EBL = Electronic Bearing Line
♦
EBL is a dotted line: the origin of the line is the ship's or cursor position.
Engine Speed
♦
Engine's rotational speed
ETA = Estimated Time of Arrival
♦
Predicted time of reaching a destination or Waypoint.
Exhaust Gas Temperature
♦
Exhaust gas temperature after the turbocharger.
File
♦
Collection of information (of the same type) stored on a User C-CARD. Each
84
User Manual