"The Individual World Championships for which sport, the first of which was in 2005 and are held every two years, include events called ""Constant Weight"", ""Constant Weight Without Fins"", ""Free Immersion"", ""Variable Weight"", ""Static"", ""Dynamic"" and ""Dynamic No Fins""?"
Constant weight without fins 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. Constant weight without fins is the depth discipline of freediving that is most challenging, because of the physical effort needed to swim without assistance. The three main differences between free diving disciplines that involve diving to depth
Herbert Nitsch also set the Constant weight (No Fins) record during The Triple Depth in Dahab, Egypt, and went on to push the Constant record to during the World Championships in Sharm. Herbert also won the AIDA Individual World Championships. Of the other five AIDA recognised events, Nitsch has been the world record holder in four: Static Apnea, Dynamic Apnea, Free Immersion and Dynamic apnea without fins. He set a time of 9 mins 4 secs for the world Static Apnea record in December 2006 when he held his breath underwater in a swimming pool in Hurgada, a time that was beaten