Admiralty Digital Publications (ADP) are a collection of digital versions of the
UKHO's industry leading Admiralty Nautical Publications, used by mariners around
the world. ADP has been designed to meet SOLAS carriage requirements and, where
approved by the vessel's Flag State, can replace the requirement for carriage of
traditional Admiralty paper publications.
Admiralty TotalTide (ATT)
The world's most comprehensive tidal prediction program provides fast, accurate
tidal height and tidal stream predictions. The software automates the prediction
process, reduces the possibility of user error and provides an easy means of viewing
both underkeel and safe overhead clearances. It contains tidal information for over
7,000 ports and more than 3,000 tidal stream stations worldwide. It is now accepted
in place of the paper tide tables as carriage compliant by a large (and growing)
number of flag states.

Admiralty Digital List of Lights (ADLL)
This series of books provides extensive information on all lighthouses, lightships,
lit floating marks (over 8m in height), fog signals and other lights of navigational
significance.
Each publication also gives the characteristics of lights and fog signals, together
with the equivalent foreign language light descriptions. Tables can be used to calculate
the geographical and luminous ranges of lights. Details for all lights listed include
the international number, location and/or name, geographical co-ordinates, characteristics
and intensity, elevation in metres, range in sea miles and description of structure.

Admiralty Digital Radio Signals Volume 6 (ADRS6)
Admiralty Digital Radio Signals Volume 6 provides maritime radio communications
information for pilot services, vessel traffic services and port operations worldwide.
More than 3000 service locations are updated quickly and efficiently via email or
CD every week. Now accepted in place of the paper version by a growing number of
flag states. It is sold as one of the programs available within the Admiralty Digital
Publications package. You can buy as many programs in the package as you need, as
and when you need them.

There are more in development.
All three digital publications are provided on a single CD and can be individually
licensed, installed, used and updated via a single common interface that is quick
and easy to use.