Furuno FCR-2107 series, Operator'S Manual

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8-1
8. Manual Updates
SOLAS require that mariners keep their charts up-to-date for an intended voyage. Mariners receive chart corrections
and other essential information for the area of their intended voyage as
•
Notices to Mariners (by post, by email, by fax, etc.)
•
Navtex warnings
Mariners should also keep the electronic charts in their chart radar up-to-date. Regardless of the chart material used,
mariner must know which of these chart corrections are applied into their chart radar charts and which of them
needs to be added as manual updates.
Manual update may include deleting an already existing object, modifying a position or other characteristics of an
already existing object or inserting of a new object. In this chart radar, manual updates are stored in a common
database.
Mariners cannot permanently remove any of the official objects from the chart display. If a mariner needs to make
obsolete any of the official objects he deletes them. Then, in practice, the deleted features are still visible, but they
are displayed a certain way to indicate a deleted object.
However, a mariner can remove objects which he has inserted himself.
Note that the manual updates have no automatic connection to any automatic update received later for S57 charts. If
a manual update itself became obsolete, because the official chart has been updated to include the update defined as
a manual update, the mariner must himself delete the obsolete manual update in question.
This chart radar records complete usage of manual updates. All deletions, modifications and insertions are recorded
and time stamped. If the mariner wishes to see what kind of manual updates he had in the past, for example, two
weeks ago, he uses Update History to specify the relevant date range. For information on how to set Display and
Approve dates, see section 7.11 Chart Viewing Dates and Seasonal Features of the Vector Chart.