lonestarbattleship:

Twelve 14"/50 caliber Mark 4 guns for USS California (BB-44) sit at the Mare Island Naval Shipyard, ready to be installed. These guns were rebuilds of earlier 14 inch guns which had suffered from construction defects including drooping and poor accuracy. The rebuilding led to each gun gaining 20 tons of weight and being far stronger than before. Plus, the modifications to the shell chamber led to accuracy improvement.

Photographed prior to 1921.

Note: The shed-like structure may be to protect the breech mechanism. The barrel was just over 18 metres long and weighed 80 metric tons.

Source

Not the first time Mare Island had to rebuild another shipyards sub-standard work.

peashooter85:

Portrait of Russian sailors in America in 1863.

The sailors were part of a Russian fleet sent to the US to support the Union cause during the American Civil War. The fleet was used to discourage British intervention in the war and re-enforce the Union blockade of the Confederacy.

Russian sailors are buried at Mare Island naval yard, they died fighting a huge fire in San Francisco in 1863. 

peashooter85:

Portrait of Russian sailors in America in 1863.

The sailors were part of a Russian fleet sent to the US to support the Union cause during the American Civil War. The fleet was used to discourage British intervention in the war and re-enforce the Union blockade of the Confederacy.

Russian sailors are buried at Mare Island naval yard, they died fighting a huge fire in San Francisco in 1863.