Constant weight without fins

Constant weight without fins (CNF) is an AIDA International (International Association for Development of Apnea) freediving discipline in which the freediver descends and ascends by swimming without the use of fins 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.[1] 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.[2]

Current record holders

References

  1. ^ McKie, N (2004). "Freediving in cyberspace". Journal of the South Pacific Underwater Medicine Society. 34: 101–3. Retrieved 2013-10-05.{{cite journal}}: CS1 maint: deprecated archival service (link)
  2. ^ Schagatay, E (December 2011). "Predicting performance in competitive apnea diving. Part III: deep diving". Diving and Hyperbaric Medicine. 41 (4): 216–28. PMID 22183699. Retrieved 2014-02-10.{{cite journal}}: CS1 maint: deprecated archival service (link)
  3. ^ Barkhush, Amira (2024-10-11). "Ukrainian Freediver Sadurska Breaks Her Own World Record With 80-Meter Dive Without Fins". UNITED24 Media. Retrieved 2024-10-20.
  4. ^ "Petar Klovar's 103 m Constant Weight No Fins Dive Officially Ratified as World Record". AIDA International. 2025-06-20. Retrieved 2026-01-13.
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