NZQA registered unit standard
29227 version 1
Page 1 of 3
Title
Demonstrate knowledge of tidal and depth measurement theory
Level
4
Credits
12
Purpose
People credited with this unit standard are able to: understand
tidal fundamentals, interpolate tidal information, and
understand tidal measurement, tidal datums, accuracies, depth
measurement methodology, and the correlation between tidal
and depth measurement.
Classification
Surveying > Hydrography
Available grade
Achieved
Explanatory notes
1
The following legislation and documentation must be complied with:
Health and Safety in Employment Act 1992;
TH Standard 31 Standards for Hydrographic Surveys (HYSPEC) v3 (Wellington:
National Topographic/Hydrographic Authority, 2001), available at
http://www.linz.govt.nz;
IHO Standards for Hydrographic Surveys, Special Publication No 44 (Monaco:
International Hydrographic Organisation, 1998) (IHO standards), available at
http://www.iho.shom.fr;
Specifications for Geodetic Hydrographic Control Points v1.1 (Wellington: Land
Information New Zealand (LINZ), 2006), available at http://www.linz.govt.nz;
Guidelines of Good Practice for Hydrographic Surveys in New Zealand Ports and
Harbours (Wellington: Maritime Safety Authority of New Zealand, 2004), available at
http://www.msa.govt.nz.
Outcomes and evidence requirements
Outcome 1
Demonstrate knowledge of tidal fundamentals.
Evidence requirements
1.1
Tide generating forces are described.
1.2
Temporal and spatial effects on water level caused by atmospheric pressure,
wind, seiches, and precipitation are described.
1.3
Modifying influences that affect the tide are explained.
1.4
Different types of tide are identified and explained.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
1.5
29227 version 1
Page 2 of 3
Different tidal levels are defined.
Outcome 2
Interpolate tidal information
Evidence requirements
2.1
Water levels at main and secondary ports are predicted using tide tables.
2.2
Water levels at a particular time are interpolated.
Outcome 3
Demonstrate knowledge of tidal measurement and datums.
Evidence requirements
3.1
Different methods of tidal measurement and their recording are described
Range
at least two methods of tidal measurement.
3.2
Tidal streams and currents, and the methods for measuring are explained.
3.3
Tidal datums, and how to reference tidal datums to a land benchmark are
described.
3.4
Accuracies for each component part of the tidal measurement are described.
Outcome 4
Demonstrate knowledge of depth measurement.
Evidence requirements
4.1
Principles, capabilities and limitations of different depth measurement
methodologies are described.
Range
4.2
methodologies include: acoustic echo sounder, multi-beam, laser
bathymetry, lead-lining, remote sensing, side-scan sonar.
Correlation between depth measurement and tide measurement are explained.
Planned review date
Infrastructure ITO
SSB Code 101813
31 December 2020
 New Zealand Qualifications Authority 2016
NZQA registered unit standard
29227 version 1
Page 3 of 3
Status information and last date for assessment for superseded versions
Process
Version Date
Last Date for Assessment
Registration
1
19 November 2015
N/A
Consent and Moderation Requirements (CMR) reference
0101
This CMR can be accessed at http://www.nzqa.govt.nz/framework/search/index.do.
Please note
Providers must be granted consent to assess against standards (accredited) by NZQA,
before they can report credits from assessment against unit standards or deliver courses
of study leading to that assessment.
Industry Training Organisations must be granted consent to assess against standards by
NZQA before they can register credits from assessment against unit standards.
Providers and Industry Training Organisations, which have been granted consent and
which are assessing against unit standards must engage with the moderation system that
applies to those standards.
Requirements for consent to assess and an outline of the moderation system that applies
to this standard are outlined in the CMR. The CMR 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 the Infrastructure ITO qualifications@infrastructureito.org.nz if you wish to
suggest changes to the content of this unit standard.
Infrastructure ITO
SSB Code 101813
 New Zealand Qualifications Authority 2016