The UKHO has licensed several commercial companies to distribute
updates to Admiralty Products direct
to vessels at sea. These Electronic Couriers, or Value Added
Resellers, supply customised correction datasets related
to a vessels' portfolio of Admiralty Charts and Publications.
The datasets are derived from the Admiralty digital files
which can be found on the UKHO website.
These companies do not deal directly with the end user,
but work together with Admiralty Chart Distributors to supply
electronic updates for paper charts and publications to
enhance the one-stop shop concept for Admiralty Charts and
Publications. These Electronic Courier Services are designed
to assist ship owners and masters in the management of chart
and publication folios in the application of International
Safety Management Codes.