VisionMaster Ship’s Manual Chapter 1
Technical Specification Chart Match
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At higher range scales the following feature sets can be applied.
• at 96 NM Base chart set only is available;
• at 48 NM Base and Standard chart sets are available;
• at 24 NM Base, Standard and Other chart sets are available.
7.21.5 Chart Match
Chart Match allows the operator to correct any discrepancy between the
radar video and the chart display. By selecting the radar object and the chart
object to be matched, an offset can be created that is applied to the chart
display. This offset persists until the chart match is cancelled, or until the
chart cells displayed on the screen at the time of the selection are no longer
on the screen.
Chart Match includes the capability to specify a range and bearing
adjustment to be applied to any loaded chart in order to alter the chart's
relative position to the own ship's CCRP plotted position.
7.21.6 Chart Updates
All chart updates made by the operator are logged in the chart engines. A
record of C-MAP updates is kept in the C-MAP database; the SevenCs
engine keeps a record of updates in a log file.
The log file or database record contain, for each update applied to or rejected,
the following information:
• Date and time of application/rejection.
• Complete and unique identification number of update as described in the
S-57 product specification.
• Any anomalies encountered during application.
• Type of application: manual/automatic.
A summary of S63 (encrypted S-57) chart updates can be viewed via a
secondary window. This summary window shows the following data:
• Reference name of the updated chart
• Chart issue date
• Application date
• Edition number and date of cell involved
• Update numbers
• Number of objects in the affected cells
• Chart type
•Status
If an update is not properly applied or the update is out of sequence the
update is terminated, an update rejection is logged by the system and a
warning of this action is given.
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