Transcript for South Carolina Fathers, Sons Survive in Shark-Infested Waters
The story of 20 harrowing hours off the coast of south Carolina. Two fathers and two young sons treading water after their boat capsized. How they survived. One of my biggest fears. Not knowing if they get out of the water at all. This morning, lucky to be alive. Watch as four boaters are reunited with their families after spending over 20 hours, stranded off the coast of south Carolina. Heath, his 11-year-old son and his friend, along with heath's friend, all fighting for survival after their boat lost power and capsized moments from shore. The ship wrecked group spent nearly a day in shark-infested waters slowly losing hope. They were swimming through our legs. Several times I just wanted to stop. Reporter: Until their prayers were answered. They noticed some people waving their arms in the water, we were very, very happy and relieved that all four people had been found. Reporter: Now the four survivors home safe but the emotions still overwhelming. Exciting, happy feeling. That story is bad enough, imagine being out there with your child. You feel so responsible. Absolutely. You're blind in that water. Overnight. You could feel them nipping at you. My heart is beating. Let's move on now, rob,
This transcript has been automatically generated and may not be 100% accurate.