CherSoft developed the Admiralty Digital Products suite for the United Kingdom Hydrographic Office.
ADP contains TotalTide as well as digital versions of Admiralty List of Lights and Radio Signals Volume 6. These products have been specifically designed to reduce the time and effort spent on manual corrections of paper publications.
A chart-based interface and comprehensive search facilities make the products easy to use, and they can be kept completely up to date for safety-critical information through the use of a free automated update service.