Here is the part of rules for start:
For speed apnea competitions the swimmers dive from the starting blocks.
For endurance apnea competitions the swimmers start their competition already in the water.
Note that there is another discipline coming soon The Endurance Apnea which is 400 meters apnea
Devrim, himmm not yet. He has got his some values but I really don't know yet. The best we can get will be at May, the national competition.