Operation Manual

152
User Manual
0 to 0.1 kn -
0.2 to 1.0 kn -
1.1 to 2.0 kn -
2.1 to 3.0 kn -
3.1 to 9.9 kn -
Yellow
Yellow
Orange
Orange
Red
Fig. A.1b - Tides & Currents table
When the chart plotter receives a valid position fix, the Tide icons are shown on the charts on the basis
of the current date and time: the screen displays and changes arrows as date/time changes.
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 Time Line
The location where the ship will be after the time set by the user.
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 Tracks & Routes
Recommended and established routes for ships at sea, including traffic separation schemes, deep water routes, ....
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 TRN = Turning
The difference between COG and BRG. If COG is 80° and BRG is 75°, TRN is 5° Left.
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 TTG = Time To Go
The estimated time needed to reach your destination, based on your current speed and the distance to
destination.
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 User Point
Place on the chart identified by its coordinates and displayed on the screen with a reference symbol (see
Mark, Waypoint and Event).
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 UTC = Universal Time Coordinated
A time scale based on the rotation of the earth that is used by most broadcast time services.
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 UTM = Universal Transverse Mercator
Metric Grid system used on most large and intermediate scale land topographic charts and maps.
VAD = Value Added Data
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 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.
VMG = Velocity Made Good
It is the destination closing Velocity. The VMG is calculated using the current speed of the vessel
(SOG) and the difference between the current vessel course and the bearing to the destination.
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 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.