The magnetic variation curves have been updated with 2020 data. Under new royalty terms, the DGA (Danish Geodata Agency) have made it unviable to reproduce their copyrighted data. All DGA data has been removed from this chart. There has been general updating throughout.

Compiled by a team of Cruising Association regional editors and Imray, the Cruising Almanac is an annual publication first published over 100 years ago and long regarded as the perfect on board companion for cruising yachts. Each year, a well-known cruising sailor writes the Preface, and this year's is by Tom Cunliffe. The Almanac covers Northwest Europe from the Shetlands and southern Norway to Gibraltar and West Ireland to the Baltic. Based on first-hand experience and official data, all sections - text, plans, tidal data - are checked and updated annually. With over 750 port entries alongside passage notes (easily identified by their pale blue background colour), it's a vital tool for both planning and whilst at sea. 2021 tide tables for 47 standard ports are included in a separate booklet. The main Almanac contains tidal stream diagrams: full tidal details for secondary ports are included with the text for the relevant port. Updating of the Almanac continues throughout the year, with corrections published monthly on the Cruising Association website Almanac corrections page.