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ECDIS User Guide
The following criteria are used for determining the least navigationally
significant target:
1. First the system looks for targets that are 1 minute or more past
TCPA, and within this group will drop the target at the greatest
range from own ship.
2. If no active AIS targets are at least 1 minute past TCPA then the
AIS target most distant from own ship will be set to sleeping.
AIS targets can also be automatically dropped by the operator adjusting the
Autodrop range lower than the default of 10 NM. For details, refer to
`AutoDrop Targets' in the Target Display section.
Target Alert States
The following alert states apply to any AIS target in any state, (with the
exception that sleeping targets do not raise the Lost alert):
•
CPA/TCPA/BCR or Activation zone infringement
•
Lost
CPA/TCPA/BCR
or Activation zone
infringement
Lost
65900012
When an AIS target infringes the
CPA/TCPA/BCR criteria, or when
it enters an Activation zone, the
target symbol and its
heading/vector are rendered in
flashing red.
When the AIS scaled ship symbol
is used the ship outline is also
rendered in flashing red.
Activated targets that are deemed
lost are rendered with a red cross
through the AIS symbol. The
target maintains its last heading
and COG/SOG and will continue
to be dead reckoned until the lost
target alert is acknowledged.
The cross symbol flashes while
the Lost Target alert is
unacknowledged.
Note that lost AIS targets do not
generate CPA/TCPA alarms.
Targets
10-9
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Questions and answers
HI THERE , I COULD NOT FIND THE MOB BUTTON IN THE UPPER TOOLBAR AND IN NAV TOOLS , AND THE VIDEO PLAYBACK BUTTON ON IUR SPERRY MARINWE ECDIS.
The MOB (Man Overboard) button can be found in the upper toolbar of the Sperry Marine VisionMaster FT ECDIS. It has a yellow background when the MOB event is active and a standard background color when inactive. However, there is no information provided in the context regarding the location of a video playback button.
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WHAT IS THE PROCEDURES IN MAKING PARALLEL INDEX USING SPERRY MARINE ECDIS
To make a Parallel Index (PI) using Sperry Marine Visionmaster FT ECDIS, follow these procedures:
1. Access PI Lines: Left-click on the "Parallel Index Lines" field in the NAV Tools menu.
2. Use the PI Lines Window: This window has three tabs:
- Edit Tab: Add a new PI line or set, copy, delete, rename, or realign lines to the ship's current heading.
- Display Tab: Select which PI lines to display.
3. Define Each PI Line: Set the following parameters:
- Range from the closest point to own ship
- Bearing
- Line type
- Side of the ship (port or starboard)
Up to fifteen PI lines can be displayed at once across the entire chart display in all modes.
This answer is automatically generated
AIS target not showing in ecdis