In 1960, David Marshall's life changed forever in the shark-infested waters of the South Pacific.
Surviving a traumatic 'man over-board' experience, and prompted by the continuous loss of life at sea, he embarked on a quest, dedicated to inverting a rescue beacon and improving maritime safety.
A tortuous, life long struggle followed in the face of endless difficulty, before success was eventually achieved. Battles against devious American investors, unsupportive banks and British Government bureaucracy, where just some of the hurdles he had to overcome.
Today David Marshall's beacon has helped to save thousands of lives. This is his remarkable story.