Mast Collar Insert

published 05/22/2023

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Questions:
(Note: this question was originally submitted during the rules rewrite and was the impetus for clarification in the new version of the rules.)

• Is it legal to install this Mast Partner Collar on my boat, given I have mast side chocks in place on the mast?
• To be legal, must any fitment of the collar not require filing or changing the profile of the mast partner itself?
• If it is legal, do I require this item on the measurement form to be remeasured and a new measurement certificate issued?
• If it is not legal, then why is there nothing regarding a determination on the class website given the proliferation of this item over recent years and what action will be taken to rectify this situation?

Rule C.9.1.(a)(1) applies
C.9.1 FITTINGS
     (a) MANDATORY
          (1) Mast partner blocks shall be fitted and may be attached either to the mast or the mast spar hole. If attached to the mast, they may include a step in their
               design, which shall be a clearance fit above the raised side of the mast spar hole when the mast is at rest with no tension on the standing rigging. 

Submitted by the Adelaide Fleet

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