Sperry Marine Visionmaster FT ECDIS, Руководство пользователя

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Basic Operation of ECDIS ECDIS User Guide
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Position
Summary data on own ship's current location is displayed in the left corner
of the lower toolbar area, also displayed is
the sensor source and quality indicator used
for the position values.
The operational area for the VMFT ECDIS is between 85°N and 85°S
latitude.
The information in the lower toolbar is replicated in the Position
window, accessed by clicking on the
POSN button on the lower
popup toolbar.
Ownship position information will be displayed in green, if good and using a
“continuous” positioning source. If position display is yellow, this can be
due to the positioning source being "non-continuous" which should be
considered as of "doubtful integrity". Typically this will be when the source
is from "Dead Reckoning" or "Line of Position". Alternatively, a yellow
display may also be due to position information becoming degraded,
uncorroborated or from manual input. If position information becomes
unusable it will be displayed as yellowish-orange.
The Position window includes the following data:

The latitude/longitude (L/L) position of
the
CCRP , as reported by the Position
sensor. Where the L/L data is acquired
from a valid sensor data source the
values are displayed in green, if the
position data is degraded then the
values are displayed in yellow, if the
position data is considered invalid and
unusable the data is shown in
yellowish-orange. For further information on sensor data sources
see Sensors Menu.

The sensor source of the position data. The connected position
sensor will in most cases be a
GPS receiver and should be
configured to send position data using the GGA sentence
9
. When
position data is sent using the GGA sentence, the quality is
indicated as shown in the table below.
9
NMEA sentence which provides the GPS current fix data. A sentence is a self contained line
of data.