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ECDIS User Guide
Target Monitoring
All targets are monitored for Lost Target. Established tracked targets and
AIS targets (both activated and sleeping) are monitored for
BCR/BCT
infringements, using own ship's
infringements use own ship's bow for reference.
Lost Target
If the system loses track of a target then a Lost Target warning is raised for
that target and an appropriate flashing symbol placed over the target, see
Target Monitoring Symbols.
Lost Target alerts can be raised on all nodes and a lost target alarm range
limit may be set, so that only lost targets within a specified limit from own
ship will raise a Lost Target alert. For details refer to Limits and Settings.
On dual radar a Lost Target alert is raised if neither transceiver has seen
video in the last six scans.
Any flashing Lost Target alert symbols stop flashing when acknowledged
but the alert symbol remains centred over the lost target(s).
The alert symbol is automatically cleared if:
•
the target ceases to report itself as lost; or
•
the target is cancelled or dropped.
The Lost Target alert automatically clears when there are no lost targets.
CPA/TCPA and BCR/BCT Infringement Conditions
The conditions for a target to generate an infringement are:
•
Both CPA/TCPA and BCR/BCT values are positive (i.e. target has
not yet reached the closest point but will do so).
•
Both CPA/TCPA and BCR/BCT values are less than or equal to the
limits entered.
If an infringement is detected an alert is raised and an appropriate alarm
symbol displayed flashing at the target's position.
Once the alert is acknowledged, any flashing alert symbols stop flashing
but remain over the target(s) infringing the limits.
The alert symbol, flashing or not flashing, is removed when:
•
The target no longer infringes the defined limits, for definition of
limits see Limits and Settings.
•
The target is cancelled or dropped.
65900012
CCRP
for reference. BCR/BCT
Targets
CPA/TCPA
and
10-13
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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.
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