Three Alabama firefighters who went to Pensacola,
FL, for a dive trip decided to dive together off the
boat they rented, then paid the price for that mistake
by getting separated from the boat and drifting in the
Gulf of Mexico for 12 hours. It was supposed to be
a quick, 10-minute dive on June 27, but a bad storm
turned it into a half-day rescue mission.
Bryan Densel told Alabama TV station WTVM that
  he, Michael Bass and Jeff Thompson, all experienced
  divers, headed to a favorite fishing spot 13 miles off the
  coast. A storm was in the distance, but they expected
  to be back on the boat long before it arrived. "We went
  down the anchor rope and we got disoriented and away
  from [it]," says Densel. "We didn't go far, but the water
  clouded up so fast."
When the divers surfaced, the current had carried
them 300 yards from their boat. After several hours of
hard swimming, they couldn't overcome the current
and get back to their vessel, so they banded together.
"I felt a few bumps on my tank and I got nudged a few
times, but . . . we focused on not thinking about sharks,"
Densel said.
The three swam and drifted for about 10 hours,
  through 10-foot waves and two major thunderstorms.
  Meanwhile, Thompson's wife called a friend, who luckily
  knew their dive site because Densel had mentioned
  it before the trip, and he called the Coast Guard. "The
  greatest feeling of my life was when that plane flew
  over and dropped flares right on us," Densel said. The
  Coast Guard pulled the men out at 12:20 a.m. on Sunday
  morning, dehydrated, hypothermic and covered in jellyfish
  stings, but alive.