HMS Saga (P257): The Submarine That Sank a Trawler in Peacetime

Built Too Late for the War She Was Meant For

HMS Saga was built by Cammell Laird at Birkenhead, laid down on 5 April 1944, launched on 14 March 1945 and commissioned that June, an Improved S-class submarine that arrived just as the war she had been built for was drawing to a close.

She spent her early months on trials and training out of Holy Loch and Scapa Flow, working with Allied vessels, and by the time Japan surrendered that August she was, in the words of one specialist naval history source, still working up.

Like a good number of her sister boats completed in the war's final weeks, Saga never undertook a single war patrol.

A Collision With a Fishing Trawler

Her single best documented moment of drama came not from enemy action but from an accident close to home. On 10 February 1946, HMS Saga collided with the fishing trawler Girl Lena in the English Channel, sinking her, an incident confirmed consistently across every source consulted and by some distance the most solidly attested fact of her entire career.

A Long Second Career With Portugal

In 1948, Saga was sold to the Portuguese Navy and renamed Nautilo, given the pennant number S161, one of three sister S-class boats transferred to Portugal that same year. She went on to serve in Portuguese hands for over two decades, reportedly remaining in service into the late 1960s alongside her transferred sisters, before being placed on the disposal list in 1969.

What became of her physically after that point, whether she was broken up immediately or lingered in reserve for some further years, could not be confirmed from any source consulted, and is best left as an honest gap in the record rather than guessed at.

It is a quietly fitting afterlife all the same for a submarine that missed the war she was built to fight, finding a longer and more useful career flying another nation's flag instead.