Tonner class
With ton class (n) refers to competitive sailing a boat class as construction class after the measurement formula for racing yachts IOR ( International Offshore Rule ), divided into different subgroups remuneration can sail up to today. That means that every tonner class sails in its class only according to the sailed time, the fastest yacht wins without time compensation for the other competitors.
The Tonner class was created in 1965 because the One-Ton-Cup ( one- tonne cup) was re-tendered due to the lack of participation of yachts of the previous meter class . The Cercle de la Voile de Paris , which donated the trophy , announced the regatta for sailing yachts with a maximum racing value of 22 feet according to RORC or 27.5 feet according to IOR .
The name Eintonner comes from the One-Ton-Cup from 1898 and referred to sailing boats of a construction class with a keel weight of one ton ( short ton ). When this boat class went out of fashion, the one-tonne trophy was announced in 1907 for yachts of the then current 6mR yachts until the 6-series competed for the last time in 1962. The single-ton cup has been sailed with Corel 45 yachts since 1999, which means in this case the IC45 world champion receives the single-ton cup.
Tonner classes
A distinction is made between six ton truck classes, which relate to the one-ton truck as a reference value and set a racing value limit according to the IOR formula:
- Two-tonner up to a maximum of 32.0 feet, since 1970
- One-tonne truck up to a maximum of 27.5 feet, since 1965
- Three-quarter tonner up to a maximum of 24.5 feet, since 1970
- Half-toners up to a maximum of 21.7 feet, since 1967
- Quarter-tonner up to a maximum of 18.0 feet, since 1968
- Eighth or minitone up to 16.0 feet maximum, since 1970