………At that moment, a klaxon sounded and the Captain’s voice instructed all men to action stations as a submarine had just surfaced two miles ahead just off the port beam. Within two minutes of that warning there was another call to action: three miles off the starboard beam another submarine had surfaced. And within a minute of that warning there were two more subs sighted at 45 degrees to the Iron Duke on either side. A well-laid trap had been set and it seemed that to avoid any torpedoes the Iron Duke would have to turn about………