Sperry Marine Visionmaster FT ECDIS, User Manual

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ECDIS User Guide Routes
65900012 8-31
Route
The data shown in the Route tab folder is
calculated internally from the monitored route
and is read-only.
A summary of the active leg of the monitored
route is also shown on the Route Status
popup window.
To monitor own ship's progress against a
route, the ship's COG must be within 110
degrees toward the planned track and within
80 degrees away from the planned track, this
is referred to as the `bearing criteria'. If the
ship’s COG deviates more than the bearing
criteria, then route monitoring will stop.
When a route is loaded for monitoring,
monitoring automatically starts on the leg
closest to the ship that is within the bearing
criteria. If none of the route’s legs meet the
criteria, then route monitoring will
automatically start when the ship comes within
the monitoring criteria of a route leg.
In some cases the system may begin
monitoring a leg that is not the closest
leg. This will normally occur when own
ship manoeuvres abruptly toward or
away from the closest leg, so that,
temporarily, the bearing criteria are
not met.
During route monitoring, the ship’s cross-track distance from the route is
displayed and whether the ship is to the right or left of the track.
Where monitoring values are not currently valid the field displays a series
of dashes.