August 4, 20215 yr I have been measuring my A class yacht to the best of my ability and I think I am getting close to having an accurate record using the Excel spreadsheet which is part of the A class documentation. However there is one aspect that puzzles me slightly. The design is a John Lewis Phaedra 2 and feeding in my hull measurements and the John Lewis drawing sail dimensions for the top suit, the boat comes out slightly over the maximum rating. If I reduce the height of the jib and mainsail by about 25 mm I get a rating of 1000 which I would have thought would give the maximum permitted area. However in column O of the spreadsheet there are some figures in red which are said to be the suggested maximum possible values for sail dimensions and these are all greater than my input values. The maximum possible foretriangle height is said to be 1631 mm which is greater than allowed in the rules. Could someone please explain where I am going wrong in my understanding? Edited August 4, 20215 yr by Gareth Image replaces spreadsheet
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