Manual Updates; Introduction - Furuno FEA-2807 Operator's Manual

10. Manual Updates

10.1

Introduction

SOLAS requires 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 ECDIS up-to-date. Regardless of the chart material used, the
mariner must know which of these chart corrections are applied into their ECDIS 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 ECDIS, manual updates are stored in a common database
that is used for both S57 and ARCS charts.
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 that he has inserted himself.
Note that the manual updates have no automatic connection to any automatic update received later for S57 or ARCS
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 ECDIS 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 details, see section 8.11 "Chart Viewing Dates
and Seasonal Features of the Vector Chart".
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