Navigation method
Enter a short description of your concept here (optional).
Different methods are available for calculating the distance and bearing between any two
points on a chart.
The Great circle route is the shortest path between two points. However, if you are to travel
along such a route, it would be difficult to steer manually as the heading would constantly
be changing (except in the case of due north, south, or along the equator).
Rhumb lines are tracks of constant bearing. It is possible to travel between two locations
using Rhumb line computation, but the distance would usually be greater than if Great circle
is used.
Phantom Loran
Enables use of Phantom Loran positioning system.
Loran settings
Defines Loran chains (GRI) and preferred station for waypoint entry, cursor position and
position panel.
The graphic example shows cursor position window with Loran position information.
For more information refer to your Loran system documentation.
Arrival radius
Sets an invisible circle around the destination waypoint.
The vessel is considered arrived at the waypoint when it is within this radius.
XTE limit
Enter a short description of your concept here (optional).
This parameter defines the vessel’s accepted offset distance from the leg. If the vessel goes
beyond this limit, an alarm will be activated.
Arrival alarm
Enter a short description of your concept here (optional).
When the arrival alarm is enabled, an alarm will be activated when the vessel reaches the
waypoint or when its within the specified arrival radius.
Magnetic variation
Magnetic variation is the difference between true bearings and magnetic bearings, caused
by different location of the Geographic and the Magnetic north poles. Any local anomalies
such as iron deposits might also affect the magnetic bearings.
When set to Auto, the system automatically converts magnetic north to true north. Select
manual mode if you need to enter your own local magnetic variation.
Datum
Most paper charts are made in the WGS84 format, which also is used by the NSS evo2
system.
If your paper charts are in a different format, you can change the datum settings accordingly
to match your paper charts.
Coordinate system
Several coordinate systems can be used to control the format for lat./lon coordinates
displayed on the chart panel.
36
Navigating
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