Is it necessary to float a Ten Rater at the time of certification control (measurement) to establish the correct placement of the waterline limit marks?

No. The true waterline length is not a measurement that is required at certification control (measurement) or at any other time unless the purpose of the measurement is to determine compliance with the certificate (equipment inspection).

What is required is placement of the waterline limit marks and measurement of the distance between them. Class rule C.4.1 shall be complied with when the boat is racing and, providing the boat complies fully with the class rules when racing, no rule is broken if the boat has not been floated at the time of initial certification control.

The requirement in the 2002 CR to have the waterline endings no more than 30 mm inboard of those limit marks no longer applies.