23869 version 1

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Demonstrate knowledge of hydrographic surveying in support of coastal zone management

Level / 6
Credits / 8

PurposeThis unit standard is for people working in the hydrography sector of the surveying profession.

People credited with this unit standard are able to demonstrate knowledge of hydrographic surveying in support of coastal zone management.

Subfield / Surveying
Domain / Hydrography
Status / Registered
Status date / 25 February2008
Date version published / 25 February2008
Planned review date / 31 December 2012
Entry information / Open.
Replacement information / This unit standard and unit standard 23868 replaced unit standard 11148.
Accreditation / Evaluation of documentation and visit by NZQA and industry.
Standard setting body (SSB) / Infrastructure ITO
Accreditation and Moderation Action Plan (AMAP) reference / 0101

This AMAP can be accessed at

Special notes

1The following documentation must be complied with:

TH Standard 31 Standards for Hydrographic Surveys (HYSPEC) v3 (Wellington: National Topographic/Hydrographic Authority, 2001), available at

IHO Standards for Hydrographic Surveys, Special Publication No 44 (Monaco: International Hydrographic Organisation, 1998) (IHO standards), available at

Guidelines of Good Practice for Hydrographic Surveys in New ZealandPorts and Harbours (Wellington: Maritime Safety Authority of New Zealand, 2004), available at

World Ocean Circulation Experiment Standard, available from National Institute of Water and Atmospheric Research, Telephone 0800 746464 (NIWA standard);

job specifications;

equipment manufacturer’s instructions.

2Definition

Maritime practice refers to documented practices and procedures that meet the standards of Maritime New Zealand and the International Maritime Organisation.

Elements and performance criteria

Element 1

Demonstrate knowledge of hydrographic surveying in support of coastal zone management.

Performance criteria

1.1Techniques for coastal zone management surveys are identified in accordance with job specifications, HYSPEC, and IHO standards.

Rangesurveys at scales of 1:5000 or larger – dredging, harbour, pipeline outfall, marina;

dredging surveys – pre, interim, post;

evidence is required of five surveys.

1.2Techniques for examination, search, and removal of obstructions in port and coastal zones are identified in accordance with HYSPEC and IHO standards.

1.3Survey requirements particular to dredging surveys are identified in accordance with job specifications, HYSPEC, and IHO standards.

Rangerequirements – types of dredges, calculation of volumes, horizontal control, vertical datum, processing of data.

1.4Methods and instrumentation used for water flow surveys are identified in accordance with job specifications and the NIWA standard.

Rangetwo water flow surveys.

1.5Requirements for identifying hazards, and marking hazards and channels with navigational aids are identified in accordance with HYSPEC and maritime practice.

1.6Siltation and erosion processes are identified and explained with respect to the coastal environment.

Rangeone each of – siltation, erosion.

1.7Geotechnical sampling equipment and techniques for the gathering and storing of samples are identified and described in accordance with job specifications, the NIWA standard, and maritime practice.

Rangeequipment – grab sampler, corer, dredge.

Please note

Providers must be accredited by NZQA, or an inter-institutional body with delegated authority for quality assurance, before they can report credits from assessment against unit standards or deliver courses of study leading to that assessment.

Industry Training Organisations must be accredited by NZQA before they can register credits from assessment against unit standards.

Accredited providers and Industry Training Organisations assessing against unit standards must engage with the moderation system that applies to those standards.

Accreditation requirements and an outline of the moderation system that applies to this standard are outlined in the Accreditation and Moderation Action Plan (AMAP). The AMAP also includes useful information about special requirements for organisations wishing to develop education and training programmes, such as minimum qualifications for tutors and assessors, and special resource requirements.

Comments on this unit standard

Please contact Infrastructure you wish to suggest changes to the content of this unit standard.

 New Zealand Qualifications Authority 2018