First British submarine with a name , newest type of vessel launched at Chatham . The HMS Oberon ( P21 ) an Odin-class submarine being escorted by admiralty tugs . 25 September 1926.
First British submarine with a name , newest type of vessel launched at Chatham . The HMS Oberon ( P21 ) an Odin-class submarine being escorted by admiralty tugs . 25 September 1926