Timed breath holding and is usually attempted in a pool. This is considered to be the only team discipline as you have a coach during the performance.
DYNAMIC APNEA WITH FINS
The athlete can choose whether to use bi-fins or a monofin to reach horizontal distance. This is usually done in a pool or shallow open water.
This is underwater swimming in a pool for distance without any swimming aids like fins. The key is good hydrodynamics and good technique.
CONSTANT WEIGHT APNEA
The athlete has to dive to the depth following a guide line that he or she is not allowed to actively use during the dive. The ‘Constant Weight’ refers to the fact that the athlete is not allowed to drop any diving weights during the dive. Both bi-fins and monofin can be used during this discipline.
CONSTANT WEIGHT APNEA WITHOUT FINS
CNF follows the identical rules as Constant Weight, except no swimming aids such as fins are allowed. This discipline is the youngest discipline within competitive freediving.
FREE IMMERSION APNEA
FIM is a discipline in which the athlete uses the vertical guide rope to pull him or herself down to depth and back to the surface without using ballast or fins. It is known for its ease compared with the Constant Weight disciplines, while the athlete is still not allowed to release weights.