Constant weight without fins (CNF) is an AIDA International (International Association for Development of Apnea)

freediving Freediving, free-diving, free diving, breath-hold diving, or skin diving, is a mode of underwater diving that relies on breath-holding until resurfacing rather than the use of breathing apparatus such as scuba gear. Besides the limits of breat ...

discipline in which the freediver descends and ascends by swimming without the use of

fins A fin is a thin component or appendage attached to a larger body or structure. Fins typically function as foil (fluid mechanics), foils that produce lift (force), lift or thrust, or provide the ability to steer or stabilize motion while travelin ...

or without pulling on the rope or changing his or her ballast; only a single hold of the rope to stop the descent and to start the ascent is allowed. Constant weight without fins is the depth discipline of freediving that is most challenging, because of the physical effort needed to swim without assistance.

Challenges

The main differences between free diving disciplines that involve diving to depth and those that occur at the surface are: the dive cannot be interrupted, there are periods where work is performed and the diver is impacted by direct effects of pressure.

Current record holders

* Women: Kateryna Sadurska (

Ukraine Ukraine is a country in Eastern Europe. It is the List of European countries by area, second-largest country in Europe after Russia, which Russia–Ukraine border, borders it to the east and northeast. Ukraine also borders Belarus to the nor ...

) – 80 metres on October 7, 2024 * Men: Petar Klovar - 103 metres May 26, 2025 pending doping results William Trubridge (

New Zealand New Zealand () is an island country in the southwestern Pacific Ocean. It consists of two main landmasses—the North Island () and the South Island ()—and List of islands of New Zealand, over 600 smaller islands. It is the List of isla ...

) – 102 metres on July 21, 2016

References

External links

AIDAWilliam Trubridge 101m CNF World Record Freedive
{{Underwater diving, frediv * de:Apnoetauchen#Tieftauchdisziplinen mit konstantem Gewicht