These Principles have been prepared by the Hydrographic Surveyors Working Group of Ports Australia. They are intended for use in Ports and supplement the International Hydrographic Organization (IHO) Special Publication S-44 (Standards for Hydrographic Surveys) available from the IHO website: http://www.iho.int/iho_pubs/standard/S-44_5E.pdf . These Principles have been designed as performance standards and as such do not describe the detailed process that shall be followed to ensure the required standard of information is obtained and subsequently maintained.  

These Principles are primarily intended for (but not limited to) use in Australian ports where shipping regularly or on occasions operates with restrictions on Under Keel Clearance (UKC). They are targeted at the provision of hydrographic data that is used as input in a port’s UKC formula.

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