Sperry Marine Visionmaster FT ECDIS, User Manual

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ECDIS User Guide Navigation Tools
65900012 5-23
A minimum of three LOPs are required for a Visual, Range, or Composite
type fix. Only two LOPs are required for an EP Fix.
The table below gives a description of each LOP fix label.
Label Description
EP Position was obtained using two points.
V
Position was obtained by making only bearing observations.
R
Position was obtained by making only range observations.
VR
Position was obtained by making both bearing and range
observations.
Using a LOP Position Sensor
A LOP fix may be used as the active data
source for the position sensor, see Position
Values in Sensor Management.
The LOP Position Sensor displays the
Latitude/Longitude coordinates of the permanent
fix.
If the LOP Position sensor is selected, own ship
is re-positioned so that its CCRP is at the centre
of the permanent fix symbol.
The amount of time that the LOP position sensor will be considered
usable after a fix is set in the configuration tool (default time 300
seconds). Note that LOP position sensor data is dead reckoned
between each fix, and this data will become degraded after a
period of time.