UR Z13 Voyage repairs and maintenance - Rev.3 Jan 2011

UR Z15 Rev1 Corr1 CLN

UR Z15 Hull, structure, equipment and machinery surveys of mobile offshore drilling units - Rev.1 Corr.1 Oct 2016

UR Z16 Periodical surveys of cargo installations on ships carrying liquefied gases in bulk Rev.4 Oct 2013

UR Z17 Procedural requirements for service suppliers - Rev.12 Nov 2016 Clean.

Note: UR Z17 Rev 13 will come into force on 1 January 2019 and can be found in "Previous Revisions" 

UR Z18 Periodical survey of machinery - Rev.6 Aug 2016. Implementation date 1 July 2017.

UR Z18 Rev 7 will come into force on 1 July 2018 and can be found in "Previous Revisions" 

UR Z19 New

UR Z19 Calibration of measuring equipment - April 1999

UR Z20 New

UR Z20 Planned maintenance scheme (PMS) for machinery - May 2001

UR Z21 Surveys of propeller shafts and tube shafts - Rev.4 Oct 2015

Survey requirements for automatic air pipe heads - Deleted July 2014

UR Z23 Hull survey for new construction - Rev.6 Nov 2016 Clean.

UR Z24 Survey requirements for shell and inner doors of ro-ro ships - Corr.1 July 2011

UR Z25 Periodic Survey of Fuel Installations on Ships other than Liquefied Gas Carriers utilizing gas or other low flash point fuels - Jan 2017.

Note: UR Z25 Rev 1 will come into force on 1 January 2019 and can be found in "Previous Revisions" 

UR Z26 New

UR Z26 Alternative Certification Scheme (ACS) - Feb 2015

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