Furuno FCR-2107 series, Operator'S Manual

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7. Vector Chart Material
7-55
Authentication of chart failed
The chart was not loaded because of
missing signature.
The chart was not loaded because of
coding error in Signature.
The chart was not loaded because of
tampered Signature or invalid Public
Key.
The chart was not loaded because of
invalid or tampered Signature.
7.8.3 Additional messages in S57 SENC conversion
Messages which contain only notice
You do not have a permit.
Messages which require careful attention
Permit for a chart has expired.
You have a permit, but it is valid for
another edition of the cell.
You can check edition of the permit
using the Chart Permits window and
the edition of a chart using the Cell
Status window, both in the Chart
menu.
A typical reason is that the chart has been updated too many times as a new
edition instead of an update. Ask for new permits from your chart agent.