Mark, There is a PHRF / D-PH conversion here: http://www.ussailing.com/Portsmouth/table_v.htm Here are both numbers - I hope this will work: Code D-PN PHRF MON8 134 474 Montgomery 7-11 MON10 133 468 Montgomery 10 MON12 110 330 Montgomery 12 MON15 108.2 319.2 Montgomery 15 MON17 104 294 Montgomery 17 MON172 95.8 244.8 Montgomery 17 Fl.Deck MON17H 100.7 274.2 Montgomery 17 TM MON23 94.8 238.8 Montgomery 23 steve Steve R. M-15 #119 ******************************************* Hello, I wish I could race my boat, unfortunely most the clubs around here use the PHRF rating sytem and restrict boats under 20 feet from racing. They also frown on boats with trunk keels. Whadayagonnado? Mark Escovedo M17F/D #103 "AMY"