Constant weight without fins

The freediving breaststroke technique used for CNF dives

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.

^ 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.{{cite journal}}: CS1 maint: unfit URL (link)

[RRR8947-1] 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.{{cite journal}}: CS1 maint: unfit URL (link)

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