The average weight for persons used for commercial vessel stability calculations in Australia is being increased from 75kg to 80kg. This is due to social changes affecting engineering rather than due to a safety margin being added.
A measurement system may/does work well for catamaran classes but they would be more inaccurate for monohulls. More measurement data would certainly be required for a dinghy because hull shape is more influential on dinghies than cats. Also, crew weight is anecdotally a more significant influence on performance for a dinghy than a cat so this would have to be accounted for.
Mono's also plane and have symetric Spi's this also makes a massive difference (I know the Shearwater Cat has a Sym).
SCHRS has boards aspect ratio, weight etc.
What is wrong with aspcet ratio is is the most dominant factor in "normal boards".
Very thin boards do not perform at low speeds (I'm talking about aspect ratio > 6)
Very fat boards do OK in low speeds but suffer in fast.
Someone could choose to design very short and thin boards that get hit quite hard unser SCHRS, but why do it? Why would someone choose to design someting that will perform badly?
