Burnett, who’s 41, grew up largely in Plano but has rarely been landlocked since: She now lives in St. Lucia, an island not far from Dominica. She started free diving in July 2023, less than a year ...

She survived the Titanic—but it wasn’t the only time she faced death at sea. Before she became known as ‘Miss Unsinkable,’ Violet Jessop weathered a childhood plagued by illness.