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The process of determining the PHRF for an individual boat begins with the regional PHRF rating, then adjustments are made for the individual attributes of the boat such as: modifications to the rig, the size of the largest foresail (jib or genoa), the size of the spinnakers, type of keel (full, fin, wing etc.), the number of blades on the propeller, and the style of the propeller (fixed ...
In 1950 he received support from the Portsmouth Harbour Racing & Sailing Association to produce the first edition of the Langstone tables for club use when they would be known as Portsmouth numbers. In 1960 he handed over the administration to the RYA and in 1976 a new YR2 format was used, with the Langstone tables being removed in 1986.
In the United States, the most common handicapping rule is the PHRF rule, developed and promoted by the United States Sailing Association. [2] While most other rules do not take past performance into account, PHRF differentiates itself by allowing skippers to request handicap reductions after a series of poor racing results.
US 25 SD Model with a shoal draft keel giving a draft of 2.67 ft (0.81 m). This model has a PHRF racing average handicap of 237. [6] [8] US 25 CB Model with a retractable centerboard giving a draft of 2.67 ft (0.81 m), allowing beaching or ground transportation on a trailer. This model has a PHRF racing average handicap of 234. [6] [7] [9]
For sailing downwind the design may be equipped with a symmetrical spinnaker of 1,572 sq ft (146.0 m 2). [ 7 ] The design has a hull speed of 8.06 kn (14.93 km/h) and a PHRF handicap of 81 for the shoal draft model.
The boat was built by B Boats in the United States, who constructed just 14 examples, starting in 1995, before production ceased. [ 1 ] [ 4 ] The B-32 was recognized as the Best PHRF/Sportboat of the year for 1996 by Sailing World .
The design was built in the United States starting in 1994 in California by Moore Sailboats, which built the first 35 boats. Santa Cruz Yachts then built about 20 more, before production was assumed by Ultimate Sailboats until it went bankrupt. The class association then bought the molds and had the design built by Abbott Boats in Canada.
In a 2018 article, Scuttlebutt Sailing News noted, "considered a lovely boat to sail, this state-of-the-art offshore one design quickly became an international attraction." [12] In a 2021 article in Yachting World yacht designer Mark Mills named the design his choice for the "world's coolest yacht". He wrote "the Mumm 30 for me is the most ...