Lorenz Compact 7 Plus, User Manual

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106 User Manual
UTC = Universal Time Coordinated
A time scale based on the rotation of the earth that is used by most broadcast time services.
UTM = Universal Transverse Mercator
Metric Grid system used on most large and intermediate scale land topographic charts and maps.
VAD = Value Added Data
The Value Added Data (VAD) is a collection of additional cartographic objects which are not present
on the original paper chart (from which the electronic chart derives). These objects have been obtained
from other sources (that C-MAP believes to be reliable) and then merged to the electronic charts in
order to provide more information useful for the navigation.
VAD object can be any cartographic objects and it can be distinguished from the official-chart-objects
from the Quick Info. A dedicated icon is shown on the Quick Info window to indicate that the object
queried is a VAD.
The same icon is also shown on the Full Info page and in addition the extended text Value Added Data
is shown on the details of the VAD object.
WAAS = Wide Area Augumentation System
The Federal Aviation Administration (FAA), in cooperation with other DOT organizations and DOD,
is augmenting the GPS/SPS with a satellite-based augmentation system, the WAAS. It will provide a
signal-in-space to WAAS users to support en route through precision approach navigation. After achieving
initial operational capability, the WAAS will then be incrementally improved over the next years to
expand the area of coverage, increase the availability of precision approaches, increase signal redun-
dancy and reduce operational restrictions.
Waypoint
Any point to which one intends to navigate. A sequence of Waypoints makes up a Route plan .
WGS-84 = World Geodetic System 1984
Coordinates System or Datum developed by the Defense Mapping Agency (DMA).
Zoom-In
Shows more detail in a smaller area.
Zoom-Out
Operates similarly to zoom -in, but in the reverse, showing a wider but less detailed view.
XTE = Cross Track Error
The distance from the ship's present position to the closest point on a line between the origin and
destinations Waypoints of the navigation leg being traveled.