Sub S-4 floated with pontoons, at Navy Yard

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Sub S-4 remains towed to Navy Yard drydock.
Conning Tower of the S-4 after being raised and brought to Navy Yard.
Conning Tower with flag at half mast, sunken sub S-4 at Navy Yard
Sunken sub S-4 at Navy Yard
Sub S-4 being towed into drydock at Navy Yard.
Flat at half mast on Conning Tower of Sub S-4.