No-limits apnea is an AIDA International freediving discipline in which the freediver descends and ascends with the method of his or her choice. Often, a heavy metal bar or "sled" grasped by the diver descends fixed to a line, reaching great depths. The most common ascension assistance is via inflatable lifting bags or vests with inflatable compartments, which surface rapidly. The dives may be performed head-first or feet-first.
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.
- Competitive apnea – Underwater diving without breathing apparatus
- McKie, N (2004). "Freediving in cyberspace". Journal of the South Pacific Underwater Medicine Society. 34: 101–3. Retrieved 2013-10-05.
- Clarey, Christopher; Tribune, International Herald (2002-10-19). "A free-diver's death : Tragic plunge to the limits". The New York Times. ISSN 0362-4331. Retrieved 2019-08-18.
- www.hindustantimes.com https://www.hindustantimes.com/world/french-free-diver-loic-leferme-dies-in-training-accident/story-s3ehhntj4bcuccrutyzcul.html. Retrieved 2019-08-18. Missing or empty
- 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.
- Types of Diving
- AIDA International: International Association for Development of Freediving
- Current Freediving World Records