So the most basic thinking is that if one can swim a 100m dynamic, then they can dive to 50m and return safely. Of course we know that is not the case. Not having a lot of time to train in the ocean (winter in New England... brr) I have been swimming laps fairly regularly, mainly just to cure the winter boredom. For those of you that swim dynamics and depth regularly, what is the relationship? Do any of you have extremely poor dynamics but can descend to impressive depths, like some that have terrible dry statics but are also great divers?