Shom has been publishing all the corrections to be made online since January 1, 1999. Please note that some corrections require you to download specific fonts available on the "Warning" page on the Shom site. These corrections are available on Notices to Mariners Group Online.
corrections to nautical charts
Corrections to Sailing Directions
corrections to the light books
corrections to radio signal works
Corrections to other works
Clarification: the editions available only in digital version no longer have separate corrections. For one year the updates are made free of charge by the new download.