Important changes to country prefix and numbering of LINZ Pacific nautical charts

19 December 2019

We are beginning a programme of work to update the prefix on nautical charts to their relevant two digit country code.

LINZ is responsible for developing and maintaining nautical charts for New Zealand and a number of Pacific Island nations including the Cook Islands, Niue, Samoa, Tokelau and Tonga.

Currently our charts are prefixed with ‘NZ’ in front of their unique chart number, regardless of whether they cover New Zealand waters or not.

Pacific charts for Pacific mariners

We are beginning a programme of work to update the prefix on nautical charts to their relevant two digit country code.

The new country-specific codes will give Pacific island nations more ownership of nautical charts in their region and make it easier for users to identify the charts they need.

The change affects both Electronic Navigational Charts (ENCs) and paper charts. These Pacific charts will continue to be maintained and published by LINZ.

New country prefixes

The ‘NZ’ chart prefix will be replaced with country prefix as follows:

  • Tonga = TO
  • Niue = NU
  • Samoa = WS
  • Tokelau = TK
  • Cook Islands = CK.

The unique number for each chart which follows the prefix, will also be changing.

Charts with the new prefix and number will begin to be published in early 2020, with Niue and some Tongan charts the first to change. 

Notice to Mariners

Users will be alerted to the changes through the NZ Notice to Mariners (NtM) editions.

Subscribe to Notice to Mariners 

Once each new chart is published, the previous version of that chart which carried the NZ prefix and old number, will be withdrawn. 

Schedule of changes

A schedule of upcoming charts affected is available at Changes to country prefix and numbering of LINZ Pacific nautical charts

Feedback

If you have any concerns or comments about these changes, please email Hydro@linz.co.nz.

Media enquiries

Email: media@linz.govt.nz or phone: 027 566 5251