 Every yacht model has a SRS number that was previously based on results in regattas or, for new models, based on a velocity prediction program (VPP) as in IMS and some other handicapping systems.The SRS number is multiplied by the measured time in order to get the handicap corrected time.Thus, a yacht with SRS 1.30 needs to sail at least 30% faster than a yacht with SRS 1.00 to win over it.