About Tonic23
Not a company. A shared logbook, kept by the people who sail these boats.
Why this site exists
Kept alive by owners
Jeanneau stopped building the Tonic 23 in 1992 and stopped supporting it long before that. What is left is a few hundred boats and the people who keep them going.
This site is where that knowledge lands: measurements, drawings, manuals, and the write-up of a job someone has already got wrong once so you do not have to.
How it works
Everything is free
The archive, the articles, the fleet register. An account exists so we know who is out there, not so we can charge you.
Everything is checked
Figures are measured rather than copied. Where a number is an estimate, it says so.
Nothing is sold
No advertising, no affiliate links, no data going anywhere.
The next owner of your boat will read what you wrote down. That is the whole idea.
Sailing a Tonic 23? Put it on the map.
Every boat added tells the next owner something. It takes five minutes and it costs nothing.