MX510/MX512 Operator & Installation Manual - Simrad Professional ...

VTS
WAYPOINT
Vessel Traffic Service
A point, usually along the track of the vessel or vehicle, whose position
coordinates may be stored in the navi gator. The point position is the basis for the
heading, range, heading-to-steer, estimated time of arrival, and steering display
calculations.
WAYPOINT CLOSURE VELOCITY (WCV)
The speed the vessel is moving in the direction of the next waypoint. WCV should
be used for optimization in cases where TWD is expected to vary drastically before
the waypoint is reached. See also VELOCITY MADE GOOD.
WAYPOINT PASS CRITERIA
WCV
The criterion by which the navigator determines the passing of a waypoint. The
criterion is selected in CFG 1, Navigation.
See WAYPOINT CLOSURE VELOCITY.
WORLD GEODETIC SYSTEM (WGS)
Worldwide datums (WGS 72 and WGS 84) used for satellite navigation systems.
The main difference between WGS 72 and WGS 84 is a small eastward shift. The
resulting difference in position will normally be 0.01 minute of longitude, which will
not be noticeable on charts of scale 1:50 000 or smaller. You may thus use the
WGS 84 Plus Offset datum with charts marked with a WGS 72 offset. All charts
will eventually be converted to WGS 84 datum.
X-TRACK ERROR (XTE)
1PPS
See CROSS TRACK ERROR.
One Pulse Per Second – A timing signal generally provided by GNSS receivers.
196 | Appendix E - Glossary