Pool Disciplines
Dynamic With Fins (DYN)
The freediver travels in a horizontal position under water attempting to cover the greatest possible distance. Any propulsion aids other than fins or a monofin and swimming movements with the arms are prohibited Dynamic with fins is the most typical of both disciplines measuring the distance in freediving, because of the specific means of propulsion : long fins or monofin. Performances could only be recognized in swimming-pools with a minimum length of 25 meters, and are sometimes considered in national or indoor's 'combiné', with the Static apnea.
Dynamic Without Fins (DNF)
The freediver travels in a horizontal position under water attempting to cover the greatest possible distance. Any propulsion aids are prohibited. Dynamic without fins is the most natural of both disciplines measuring the distance for many freedivers, because it doesn't need any propulsing material, but a very good technique. Performances also could only be recognized in pools with a minimum lenght of 25 meters, and are greatly appreciated from "old-swimmers".
Static Apnea (STA)
The freediver holds his breath for as long as possible with his respiratory tracts immerged, his body either in the water or at the surface. Static apnea is the only discipline measuring the duration, and one of the three disciplines considered for the international competitions by team, with Constant weight and Dynamic with fins. Performances could be done and recognized in both pool or open water (sea, lake, river, etc).
