In the early 20th Century, the art of modern sea-faring warfare was to change forever with the introduction of the purpose built attack submarine. The power, stealth and muscle of these iron beasts could not be denied. Beneath the waves the work and lives of the submariner has never been an easy one. Their dedication, resilience and courage in service of their country is legendary. It is this remarkable match of man and machine; a harmony of courage that Ballast celebrates.