USS V-4 (Argonaut) and the diminutive USS O-2 in dry dock together. V-4 at the time was the largest submarine in the world at 381 feet long and the O-2 had a length of 172 feet. The dock is being flooded through ports in the dry dock gates at the rear of the image. PNS, 1928. [1200 x 800]

USS V-4 (Argonaut) and the diminutive USS O-2 in dry dock together. V-4 at the time was the largest submarine in the world at 381 feet long and the O-2 had a length of 172 feet. The dock is being flooded through ports in the dry dock gates at the rear of the image. PNS, 1928. [1200 x 800]