Rescuers recover UK diver who disappeared while exploring Tennessee underwater cave

The diver, who helped rescue the Thai boys trapped, is in good health.

A highly-experienced British diver who went missing as he explored an underwater cave east of Nashville has been rescued.

Specially-trained divers entered the water at approximately 6 p.m. local time to search for Bratchley, who was rescued an hour later, officials said.

Ed Sorenson, a technical cave diver from Florida, was the one to locate Bratchley and helped bring him to safety.

"Rescues are very, very rare so anytime I can bring somebody home back to their family and not in a bag, it's a great day," Sorenson told ABC News in an interview that aired Thursday on "Good Morning America."

Sorenson said it was "very difficult" to find Bratchley because the conditions within the underwater cave were dangerous and the continuous guideline to the surface that the British diver had been using was broken.

"In any cave, the guideline to the surface, if things go wrong that's your only way home," Sorenson said. "So once he got off the line, there was really no chance for him."

Fortunately, the visibility was better than Sorenson anticipated and he spotted Bratchley in a a fairly large air pocket when he first breached the surface, he said.

Bratchley is said to be in good health and good spirits, according to Bill Whitehouse of the British Cave Rescue Council. He was evaluated by medical crews on the scene and found to be in stable condition, officials said.

Bratchley disappeared between 3 p.m. and 4 p.m. on Tuesday. He'd been reportedly laying guide line when others in the group noticed he hadn't returned. Divers in his team attempted to rescue him for several hours but couldn’t find him. On Wednesday, a 911 call came in at 1:17 a.m. that Bratchley was missing, according to the Jackson County Emergency Management Agency.

It was not clear whether the group was in the cave together at the time or taking turns exploring.

"The group made an additional dive attempt to locate the missing individual prior to contacting 911. This attempt was unsuccessful in locating him," Ethan Burris, a public information officer for the Jackson County Emergency Management Agency, said in a statement Wednesday. "The missing individual is known to have extensive training and experience in this area of expertise."

The water was said to be a chilly 55 degrees.

"This dive is roughly 400 feet," Hamilton County Rescue Squad Lt. Brian Krebs said at Wednesday's press conference. "It is tight passage."

The area where Bratchley was ultimately found was an "air bell" within the cave system that was large enough for a diver to climb into and held sufficient air to survive for a period of time greater than 24 hours, according to Krebs.

The British Cave Rescue Council told ABC News on Wednesday that it was contemplating scrambling a rescue team. But a U.S. rescue team comprising of specialized rescue divers from Arkansas and Florida were already on their way to the Mill Pond Cave.

ABC News' Morgan Winsor contributed to this report.