Complex sentence: Haskew, p.54 The submarine HMS "Traveller" was lost with all hands two months after the operation, Captain St John was not on board at the time and survived the war.
Split into simpler sentences: Haskew, p.54 The submarine HMS "Traveller" was lost with all hands, two months after the operation. However, Captain St John was not on board at the time and survived the war.