Watch North Atlantic: The Dark Ocean (2023) : Full Movie Online Free Inspired by the spirit of adventure of early explorers like St Brendan the Navigator, Irish underwater cameraman Ken O’Sullivan voyages out into the open North Atlantic in search of the great sea monsters described in the explorers’ early texts which may well have been large whales. Over the course of the film, such encounters reveal how enlightenment and awareness dispel the myths and damage of the darkness of our historic perceptions.