Marine information

Learn about keeping your nautical charts up-to-date with our Notices to Mariners.

Data about the marine environment which helps us understand how to protect our biodiversity and ecosystems.

Learn about tidal theory and the different types of tides around New Zealand.

Tidal levels for standard ports, information on reading tide predictions, and the standard port datum descriptions for New Zealand ports.

New Zealand has sovereign rights over a vast area of ocean, along with the fishery, mineral and petroleum resources that may exist in that area.

Standards and specifications for carrying out hydrographic surveys for safety of navigation, and the benefits of hydrographic survey data.