The war was a textbook example of how the superbly trained Royal Navy submarine force could have a strategic effect on the conduct of operations. To meet these concerns, the Royal Navy was tasked to continue to be ready for war against Argentina, long after the conflict had ended. HMS OSIRIS was an OBERON class submarine, commissioned into the Royal Navy in 1964, and serving until 1989. Lets pause for a moment to reflect on the breathtaking audacity here of the Royal Navy. Covertly moving closer into position, she was able to visually identify the contact as the Argentine navy icebreaker ALMIRANTE IRIZAR.