This is not an exhaustive list of every development in the 2017 software, but covers the main
changes and has been produced to help owners understand changes to IRC ratings. All these are
applied automatically in the software, which is applied across the whole IRC fleet.

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More information relating to your certificate

IRC 2017 Rule 19.6 is corrected to read:

19.6 Any material in the keel fin of a keel type 10, 11 or 12 with a specific gravity greater than 8.0 (eg. lead) shall be declared in writing.

The rule text and rule changes document have been updated on the Rules & Definitions page 

IRC Technical Committee
15 December 2016

The IRC Rule text for 2017 is now online HERE, along with Definitions, a rule changes summary and further information about Aft Rigging and Lead in keel fins.

RE: JPK 10.80 and JPK 10.10 Length of Hull (LH) Measurement
BY: James Dadd & Jean Sans
DATE: 22nd June 2016

Download PDF version   (includes French version on p.2)

Following check measurements made during the past few weeks it has become apparent that the current standard hull data for the JPK 10.80 was potentially incorrect. As such both the RORC Rating Office and UNCL Centre de Calcul have worked together, along with the builder JPK to carry out further measurements on both existing JPK 10.80s and currently in-build JPK 10.80 yachts.