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 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 three main differences between free diving disciplines that involve diving to depth and those that occur at the surface are that you can not interrupt the dive, there are periods where work is performed and the diver is impacted by direct effects of pressure.[2]

Current record holders
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References
  1. McKie, N (2004). "Freediving in cyberspace". Journal of the South Pacific Underwater Medicine Society. 34: 101–3. Archived from the original on 2013-10-05. Retrieved 2013-10-05.
  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.
  3. "Yomitan woman sets new world record in freediving | Japan Update". www.japanupdate.com. Retrieved 2018-08-26.
  4. "Kiwi freediver William Trubridge sets world record". Stuff. Retrieved 2018-08-26.
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