Complex sentence: HMS "Acheron" (P411) was an "Amphion"-class submarine of the Royal Navy, laid down 26 August 1944, launched 25 March 1947, completed 1948 and carried out'General Naval Service' around the UK until the end of 1964.
Split into simpler sentences: HMS "Acheron" (P411) was an "Amphion"-class submarine of the Royal Navy, laid down 26 August 1944, launched 25 March 1947 and completed in 1948. She carried out'General Naval Service' around the UK until the end of 1964.