The S+SNZ Hydrography Professional Stream (HPS) exists to represent and support those S+SNZ members who are either involved or interested in hydrography.

Hydrography is the branch of applied sciences which deals with the measurement and description of the physical features of oceans, seas, coastal areas, lakes and rivers, as well as with the prediction of their change over time, for the primary purpose of safety of navigation and in support of all other marine activities, including economic development, security and defence, scientific research, and environmental protection.

Hydrography underpins almost every activity associated with water bodies (sea, lakes and rivers), including:

To find out more about being a hydrographic surveyor, here are some great videos to watch and get an idea of what we actually do.

The HPS seeks to provide value to S+SNZ Members by:

  • establishing effective relationships and communication with relevant industry practitioners, central and local government groups, professional bodies and training providers
  • advocating for HPS members and within the industry
  • assisting those HPS members seeking professional Hydrographic accreditation
  • supporting the S+SNZ continuing professional development (CPD) programmes to improve best hydrographic practice
  • facilitating communication between HPS members.


The Stream's leadership team meets semimonthly to discuss current issues, update project progress, foster continuing professional development needs, liaise with other relevant national and international bodies and prepare relevant submissions on behalf of the Stream. The leadership team is:

  • Andrew Price, Ocean Infinity, Tauranga
  • Declan Stubbing, DML, Tauranga
  • Emily Tidey, University of Otago, Dunedin
  • Rhys Davies, Ocean Infinity, Tauranga
  • Simon Ironside, Toitū Te Whenua LINZ, Christchurch (FIG Commission 4 representative)
  • Stuart Caie, Toitū Te Whenua LINZ, Wellington (S+SNZ Council representative and SSSI Hydrography Commission National Committee representative).


The Australasian Hydrographic Surveyors Certification Panel (AHSCP) is the recognised body that assesses applications for Specialist Certification in Hydrography, on behalf of the S+SNZ.

World Hydography Day

World Hydrography Day is celebrated annually, on 21 June, to publicise and encourage increasing the coverage of hydrographic information on a global basis, (United Nations Resolution A/60/30 dated 29 November 2005). Each year celebrates a different theme, see the International Hydrographic Organization’s website for more information.