Sorry, but that dpn to PHRF conversion does not apply to monohulls.

If so, our C 24 would have the same rating as a J 29 @ 114 - 117 - OOps, We are working on numbers for the N 20 and F 18 in the GYA (for two years), but we have not considered the F 16 since they have such a limited history for distance racing in the US. Our early provisional PHRF for a NACRA 20 is - 42.