5 Metre
# 5 Metre

5 Metre is a development sailing class of French origin.

## History

The 5 Metre rule was created in France in 1929 and not a according of the International rule in contrast to other Metre yachts.

### The formula

The measurement formula is given in the 2021 International Five Metre Rating Rules:

    $5.000{\mbox{ metres}}={\frac {L+{\sqrt[{2}]{S}}-F-{\frac {B}{2}}}{2}}$

where

* $L$ = length for rating (as defined by rule 3.4)
* $S$ = measured sail area
* $F$ = freeboard in metres (as defined by rule 3.5)
* $B$ = width in metres (as defined by rule 3.6)
