CYC PHRF Ratings
The ratings are by boat for spinnaker and non-spinnaker.
These ratings are used for all races by CYC, including sponsored regattas, pursuit starts, and buoy racing.
The ratings in use are either from US Sailing or from PHRF New England, the largest PHRF reporting fleet in the US.
Note that the differential from spinnaker to non-spinnaker is not published by either source, rather they publish the Base rating for a boat. In that scenario, the base rating is almost always for a spinnaker configuration. CYC uses its best judgement as to the offset to non-spinnaker, using established sources (e.g. other clubs, certificates) and our own experiences in prior races.