Watch Seawards the Great Ships for Free: How to Stream the Movie Online at 123Movies. . Documentary about shipbuilding on the Clyde. In 1960, Glasgow and other towns and ports on the River Clyde, on the west coast of Scotland, were still one of the world's great centres of shipbuilding. The film gives an idea of the business of building a ship - the largest moving thing made by man - from the naval architects who design her to the workmen, the shipbuilders in the yard, through to a ship's launching.