It is thought that the OFFSHORE 31 is based on the BERMUDA 30 (in turn based on the HERRESOFF 28) with an extended counter and inboard rudder. Available as a sloop, sloop w/bowsprit or ketch. Dimensions for ketch rig: I: 31.50'/9.60m J: 9.50'/2.90m P: 27.50'/8.38m E: 13.08'/ 3.99m PY: 18.00'/5.49m EY: 8.75'/2.67m Tot. SA: 408.23 ft2/37.92m2 Dimensions for sloop w/bowsprit: I: 33.00'/10.06m J: 14.40'/4.39m P: 30.00'/9.14m E: 13.50'/4.11m Tot. SA: 440.10 ft2/40.89m2 Dimensions (not rig) from orig. brochure. Dimensions and especially displacement reported by others vary.