[trux]

I think that 1m is pretty fine. I even think that reducing it further would make the sport more attractive (for sponsors, for the public, as well for competitors), more democratic, and more competitive. Why should only the first one who reaches the limit get the record? If we start measuring by decimeters, centimeters, or millimeters, all freedivers with the same level will have the chance to get a record. They won't keep it for a long time, but they will have it in their CV - a freediving world record holder. I think it is much more just when all top freedivers have a record in their logs, than when it is just the very first lucky one who had the chance to get it first and is then protected by a baselessly huge security margin.

That told, I am pretty satisfied with the current 1m, and would not like start measuring in millimeters (at least not as long as we cannot guarantee the correctness of such measuring), but protecting current record holders by a huge margin of 5m is absolutely ridiculous and unacceptable.