B&G Zeus2 12 - Manual (Page 38)

Navigation settings
Navigation method
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 a 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
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
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.
38 Navigating | Zeus2 Operator Manual