Below is a link to a document explaining the why and how of measurement.
http://home.vicnet.net.au/~nmcca/doc/Mosquito_BRR.pdfThis is a great checklist prior to purchase if the measurement certificate of a Mosquito cannot be located. It doesn't take long to complete.
http://home.vicnet.net.au/~nmcca/doc/NMCC_Measurement_Form.pdfIf it doesn't measure as a Mosquito then what yardstick are you going to use when club racing? Hard to sell it for more then the value of the fittings if it is an orphan. Sure it may fit in to a Formula but slow formula boats often sell for less then their component value, skiffs are a good example.
Boats fail measurement sometimes, usually it can be fixed. Hull girth measurements and a few other areas probably not.
Some "Mosquitos" and "Taipans" have been built which dont measure, 1 of each in South East, South Australia, that I know of, ring state measurers prior to purchase if in doubt.
Darryn