Appendix A - Terms - AvMap EKP-IV User Manual

Appendix A - Terms

This section explains the terms that you may find unfamiliar.
ACQUISITION Occurs when the EKP-IV locates a signal and collects data from a satellite.
AIRPORT DATABASE A series of files of airport positions (described near the geographical center of the
airport and as defined by ICAO), with runways, frequencies (with sectors) and services available information.
Based on the ARINC 424 format for Jeppesen's Database.
ALMANAC Data on the general location and health of all satellites in the GPS constellation. Can be collected
from any available satellite in about 15 minutes.
ALT ALTITUDE - Height above mean sea level. Density Altitude and the Altitude computed by a GPS receiver
may differ due to the effects of selective availability.
ARTCC AIR ROUTE TRAFFIC CONTROL CENTER
ATTENTION AREAS Areas in which special attention by the mariner is required, because of natural or man-
made hazards, or sailing regulations and restrictions. Moreover a special symbol (!) is placed inside the area
selecting On' or 'Contour' options. This is valid also for the categories: FISHING FACILITY, MARINE FARM/
CULTURE, MILITARY PRACTICE AREA, RESTRICTED AREA, SEAPLANE LANDING AREA. When
the area is small, it is identified only by the boundary.
ATIS AUTOMATIC TERMINAL INFORMATION SERVICE - Recorded information about weather and
other conditions at an airport, periodically updated when conditions change.
AUTOMATIC MODE The mode of operation that uses 2D or 3D, depending on the number of available
satellites (preference is given to 3D; LAT, LON and ALT).
AUTOMATIC SWITCHING Flight Plans automatically switch from one leg to the next when the Waypoint
is reached.
AUTO ZOOM (mode) The Auto Zoom mode is used to display fix position and destination (Target) always
visible on the map. The map is scrolled and zoomed automatically to have the best view displaying fix and
destination together on the screen. When this mode is active the cursor is hidden.
AWOS Automatic Weather Observation Station
AZIMUTH Bearing measured clockwise from true or magnetic north.
BATHYMETRIC LINES Imaginary lines connecting points of equal water depth.
BEACON An airport rotating beacon (white or white and green).
BISECTOR A straight line that divides an angle into two equal parts.
BRG BEARING - The horizontal direction of a destination or Waypoint measured in relation to true or mag-
netic north.
CDI COURSE DEVIATION INDICATOR - A graphical representation of Cross Track Error (XTE) show-
ing distance left or right of course. An airplane icon indicates the direction of relative motion, toward or away
from the intended Track.
COG COURSE OVER GROUND - Direction of the path over ground actually followed.
CONSTELLATION The satellites in the Global Positioning System (GPS). Positioned in six orbital planes
approximately 11,000 NM above the earth.
COORDINATES A Latitude and Longitude position that corresponds to a specific point on the earth's surface.
COURSE The planned line of travel: the line between your start position and the destination.
CTAF Common Traffic Advisory Frequency - May be Unicom, Multicom or Tower Frequency.
CULTURAL FEATURES Any man-made topographic feature as built-up area, buildings, roads, ...
CURSOR (mode) In Cursor mode the screen is controlled by your movement of the cursor. When in Cursor
mode, a data field line will appear under the Data Window providing LAT/LON of the cursor position. If a fix
has been computed, a distance and bearing will also appear from the position fix to the cursor. In this mode it is
possible to scroll on the map such that the position fix will not be displayed on the screen. When this occurs, you
can quickly display your position by activating Home mode.
DATA WINDOW Data Window is an information panel representing customized data fields. The layout of
these fields depends on the screen mode.
DATABASE A collection of data that can be accessed by the user for airports, VORs, NDBs, Intersections and
User Waypoints.
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