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WORLD GEODETIC SYSTEM (WGS)
Worldwide datums (WaS 72 and WGS 84) used for satellite naviga-
tion systems. The main difference between was 72 and WGS 84 is
a small eastward shift. The resulting difference in position will
normally be 0.01 minute oflongitude, which will not be noticeable
on charts ofscale 1:50000 or smaller. You may thus use the was 84
Plus Offset datum with charts marked with a was 72 offset. All
charts will eventually be converted to was 84 datum.
X-TRACK ERROR
(XTE)
See CROSS TRACK ERROR
IPPS
One Pulse Per Second - A timing signal generally provided by
GNSS receivers.
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