Before you decide to use a chart make sure you check the edition number, be aware of any corrections, make sure the corrections are up to date.

Updates and Corrections

Admiralty in conjunction with the uk hydrographic office produce weekly correction that can be downloaded from the Admiralty website.

Cumulative and weekly corrections

Every 6 months a Cumulative list of all weekly correction of the charts are published, however the cumulative list only provides the corrections number/code which then you need to refer to the weekly correction report for the full details of the actual correction.

It’s good practices to makes notes on the appropriate charts of the corresponding weekly correction when receive .

Chart edition Number

  • Chart catalogue (Cumulative notice to mariners issued January and June)
  • Online at