The purpose of the Paper Chart Maintenance Record is to provide the mariner with an easy method for maintaining a record of all Admiralty Notices to Mariners (NMs) and updates affecting charts held.It also provides an authoritative document which helps to assist maritime authorities in the auditing of the mariner`s chart outfit. It is vital that a complete record of all updates affecting all charts is held. This links with ISM (International Ship Management) Codes and SOLAS legislation and form the basis of good and safe practices followed by the majority of seafarers. NP133A lists charts numerically and is used to record updates (by their Admiralty Notice to Mariners number) against any chart affected.