There are two types of certificates – full measurement or partial measurement. Some races, such as the 2016 Newport to Bermuda Race, require full measurement, while others like the 2015 Marion to Bermuda Race accepted partial measurement.
Contact US Sailing to with questions determine the eligibility or need for a full measurement certificate.
Are you the new owner of a boat that had previously been rated for ORR? If so, you would need to apply for a Transfer of Owner. Here are the instruction for the ORR Transfer of Owner 2015.