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 redundancy and reduce operational restrictions.
● Waypoint
Any point to which one intends to navigate. A sequence of Waypoints makes up a Route plan.
● 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
Distance from the ship’s present position to the closest point on a line between the origin and
destinations Waypoints of the navigation.
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