[glennv]

And p.s. we are still talking about record attempts, in all other sports there is no such thing as record attempts.
So yes if you take away record attempts in freediving and get very accurate measuring devices by all means : 1 nanometer deeper is a new world record.

We could even make a rule that in competitions , where circumstances and therefore all the possible advantages/disadvantages are equal to all contestants, you get a new WR according to the latest possible measuring accuracies like in any other sport on the planet . But for WR attempts you have to make a bigger jump to make sure that it was not or can not be blamed just on some slight advantage in circumstances or whatever that gave you just that little 1 meter advantage over the old record holder.