A comprehensive list of precautions every freediver should observe before, during, and after the dive.
Precautions are not restrictions. They are what allow you to keep practicing diving for many years safely.
Communication signals with your buddy
Agree with your buddy in advance on clear signals for safety, for requesting help, and for ending the dive.
Respect your limits
Ascend when you feel the first urge to breathe, and never challenge it.
The safe diver is the one who returns home every time so they can dive again.