1927 L4 Submarine - Royal Naval Dockyard

The L4 was laid down in 1916 and commissioned in 1918. Broken up in April 1934.

In October 1927,  L4 and L5 submarines rescued crew members of the S.S. Irene from a pirate attack in Bias Bay, off Hong Kong waters. A map of the Bias Bay attack is provided here . An account of the piracy can be viewed here , scroll to page 8.

On 28 March 1928, HMS Ambrose and submarines L1, L2. L4, L5, L7 and L8 left for England on completion of service at Hong Kong.