* charts are listed in numerical order within each update.
* If the previous update information contained in the square brackets does not agree with the information on your chart, you are missing one or more NMs or you are using an old edition. You should always insert the missing NMs onto the chart before updating the chart for the latest NM.
* The geodetic datum is ahown alongside the chart number after"previous update". If the Notice affects a plan or inset, this is indicated. NB: That way all the relevant information for any particular chart is kept together ans, if that chat is cancelled or replaced by a New Edition or a New Chat, all the old tracings relating to that chart can be destroyed.