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It’s boater’s guide to federal requirements for recreational boats says that life jackets also are often required for recreational activities including water skiing and sailboarding.

“Sailboarding is sailing with a difference,” he wrote in the 1965 story.

Only then did he stop using the term “sailboarding.”

“Sailboarding is sailing with a difference,” he wrote.

When American Windsurfer published a profile of Mr. Drake and Mr. Schweitzer in 1996 depicting them as the fathers of windsurfing, Mr. Darby responded with a letter and a video, containing early footage of his wife and his sister-in-law sailboarding, that argued for his credit.