Operation Manual

148
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
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....
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 TRN = Turning
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
Estimated time needed to reach your destination, based on current speed and 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
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 (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.
VMG = Velocity Made Good
Destination closing Velocity. The VMG is clculated 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.
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 Waypoint
Any point to which one intends to navigate. A sequence of Waypoints makes up a Route plan .