Free diver makes preparation dive near the safety line by breaststroke. Picture shows a part of free diving training session in Blue Hole, Dahab, Egypt

Signed model release on file with Shutterstock, Inc.

Royalty-free stock photo ID: 57872407

Free diver makes preparation dive near the safety line by breaststroke. Picture shows a part of free diving training session in Blue Hole, Dahab, Egypt