11140 version 5
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Determine depth
Level
5
Credits
8
Purpose
This 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
equipment required to measure depth; measure depth; process depth data;
and determine depth accuracy.
Subfield
Surveying
Domain
Hydrography
Status
Registered
Status date
25 February 2008
Date version published
25 February 2008
Planned review date
31 December 2012
Entry information
Open.
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 http://www.nzqa.govt.nz/framework/search/index.do.
Special notes
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;
 New Zealand Qualifications Authority 2016
11140 version 5
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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;
job specifications;
equipment manufacturer’s instructions.
Elements and performance criteria
Element 1
Demonstrate knowledge of equipment required to measure depth.
Range
echo sounder – single beam, dual frequency, multi-beam, lead-line, wire sweep,
velocity of sound sensors, bar check, sound velocity probe, expendable
bathythermograph, motion compensator.
Performance criteria
1.1
Operational characteristics of the equipment are identified and described in
accordance with manufacturer's instructions.
1.2
Applications and limitations of the equipment are identified in accordance with
manufacturer's instructions and principles of acoustic measurement.
Element 2
Measure depth.
Range
echo sounder with or without – velocity sensor, motion sensor.
Performance criteria
2.1
Equipment is calibrated in accordance with manufacturer's instructions and
HYSPEC.
2.2
Equipment is operated in accordance with manufacturer's instructions and
HYSPEC.
2.3
Echo sounder depths are adjusted for velocity of sound and motion in
accordance with HYSPEC.
Element 3
Process depth data.
Performance criteria
3.1
Raw data are interpreted in accordance with HYSPEC and job specifications.
Range
data includes – depth, velocity, motion compensation.
 New Zealand Qualifications Authority 2016
11140 version 5
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3.2
Depths are corrected to vertical datum by tidal correction in accordance with
HYSPEC and job specifications.
3.3
Features and anomalies in depth records are identified in accordance with
HYSPEC and job specifications.
Element 4
Determine depth accuracy.
Performance criteria
4.1
Statistical error budget is compiled, and total depth error is determined in
accordance with HYSPEC and job specifications.
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 ITO askus@infratrain.co.nz if you wish to suggest changes to
the content of this unit standard.
 New Zealand Qualifications Authority 2016