US Navy Submarine Service “Dolphins - A Royal Navy Submariner recently received US Navy Submarine Service “dolphins”, making him just the second UK officer to qualify on a US Navy submarine.    Lieutenant Matt Main, already holding his Royal Navy dolphins – the unique badge which signifies a qualified submariner – has now been presented with the US equivalent after a gruelling 27 month training and qualification process.    The ceremony took place alongside HM Naval Base Clyde, where the Fleet Submarine USS NEW MEXICO was visiting.   A Marine Engineer (Submarines) in the Royal Navy, Lieutenant Matt Main is currently the Damage Control Assistant on the Fleet Submarine USS NEW MEXICO and will become the Assistant Engineer in due course before returning to the Royal Navy.   [US Navy submarine officers must qualify both forward and aft to earn their dolphins, learning to drive the submarine both surfaced and submerged].   The first Royal Navy officer to earn US Navy submarine dolphins, was Lieutenant Commander Ralph Coffey, serving of the Fleet Submarine USS PROVIDENCE in 2010.