: 1" = 2.54 cms

But you can scale a boat by using some different figure. If you have offsets
in inches and sixteenths (a common situation) with a + or - for a shade over
or under (ie. basically inches and forty-eights) you may find it easy to use
1" -> 24mm to get a slightly scaled down boat. That's exactly what I did to
build my Hybrid Cormorant. I just wrote a noddy BASIC program that converted
offsets files into new units as it is only a few lines of code. I believe
accountants use those incredibly complicated and obscure things called
spreadsheets to do the same thing... but I learnt my programming when it
was all FORTRAN programs on punched tape :-)

Andy