Tampa, Fla. ? Doug White and his family had just enjoyed a smooth takeoff and were ascending through the clouds when the pilot guiding their twin-engine plane tilted his head back and made a guttural sound.

The pilot, Joe Cabuk, was unconscious. And though White had his pilot’s license, he had never flown a plane as large as this.

“I need help. I need a King Air pilot to talk to. We’re in trouble,” he radioed.

Then he turned to his wife and two daughters: “You all start praying hard.”

White, 56, landed the plane on his own about 30 minutes later, coaxed through the harrowing ordeal by air traffic controllers who described exactly how to bring the aircraft to safety. The pilot died, but White somehow managed.

White had logged about 150 hours recently flying a single-engine Cessna 172 but had no experience flying the faster, larger King Air. He declared an emergency to air traffic controllers — White already knew how to use the radio. On Sunday afternoon, he got his first lesson landing the larger craft.

They were on their way home from Marco Island, where they’d traveled after his brother died from a heart attack the week before.