The freediver dives under water along a rope by pulling on it on the descent and the ascent. It is very relaxing and pure form of freediving, often used for warm-up dives.
The freediver descends and ascends using his fins/monofin without pulling on the rope or changing his weights. This is a classic competitive discipline which will be tought in every freediving course.
Constant Weight without fins (CNF)
The freediver descends and ascends under water using only his own muscle strenght (arm strokes and leg kicks with no fins) and without pulling on the rope. Constant weight without fins is the most difficult sports depth discipline, because of absolutely no propulsing material to go down in the water. Perfection in technique, equalisation and buoyancy are essential for this discipline.
The freediver is floating on the surface attempting to hold his breath as long as possible. For many freedivers the most challenging discipline, as it is a big mind game.
Dynamic with and without fins (DYN, DNF)
The freediver travels in a horizontal position in shallow water attempting to cover the greatest possible distance.
He either is using his fins (mono- or bi fins) or arm stroke and leg kicks. DYN and DNF are two other competitive disciplines.
The freediver descends with the help of a ballast weight and ascends using his own strength: arms and/or legs, either by pulling or not pulling on the rope.
No Limits (NLT)
The freediver descends with the help of a ballast weight and ascends via a method of his choice. No limit is the absolute depth discipline for extreme athletes.
It's not about how deep you go, but HOW you go deep...