Tools
Boat comparison
Put two to four boats next to each other — dimensions, a typical second-hand asking price for each one's kind and length, and the same ratios as the ratio calculator, computed the same way so the two pages can never disagree about the same boat.
Comparing individual measured hulls — … boats, each its own certificate or record. Switch to classes to compare class associations instead, using the range of hulls matched to each one.
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Dimensions
Typical asking price
Real second-hand listings, by kind and length.
Derived ratios
The same six ratios as the ratio calculator, computed in imperial internally because that is the unit system they were defined in.