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Operation
These CPA/TCPA figures are calculated solely on AIS data and should not be
used for anti-collision purposes.
Note: Setting the CPA/TCPA filter will not activate the Filters Icon.
4.11.4 Target plot
The 'Target plot' screen shows the location of other AIS equipped vessels and
shore stations relative to your own vessel. The 'Target plot' screen provides a
basic overview of AIS targets and should not be regarded as a substitute for
display of AIS information on a dedicated electronic chart display system
(ECDIS).
The plot range can be adjusted by rotating the scroll wheel which cycles
through the ranges 0.1NM up to 100NM. The range relates to the radius of the
outer range ring shown on the screen.
Individual targets can be selected by using the arrow keys. When selected a
square outline will appear around the target and the vessel details will be
shown on the left hand side of the screen.
By pressing the options menu key, additional display features can be selected.
If the Own Vessel Details option is selected the left hand side of the screen will
change to show own vessel dynamic data.
If the MOB Details Display option is selected, the target plot will change to
show only AIS-MOB, AIS-SART, and AIS-EPIRB devices. The left hand side
of the screen will show the range and relative bearing to whichever target is
currently highlighted using the arrow keys.
4.12 Micro SD card data input
On the front of the AIS transceiver under the cover on the lower left hand side
is a socket for a Micro SD memory card. See Figure 25. This can be used to
upgrade the unit firmware, display detailed charts or to log port data. Note the
orientation of the Micro SD card, which is critical to ensure the product is not
damaged.
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