Updates can be applied to the product using a permanent pen. To view updates for your Tough Chart please click on the corresponding link below. If there is a block update shown in the list of NMs corresponding to your Tough Chart you can email CustomerServices@ukho.gov.uk stating your requirement and we will send you an adhesive label containing the update for you to apply to the product.

Please note that we can only supply blocks for current editions of Tough Charts.