Sub S-4 enters Navy Yard drydock.

Tug Falcon raising the sub S-4 off Provincetown |
Bow view of ill-fated sub S-4 in drydock. |
Sub S-4 comes to surface off Provincetown after being on the bottom for 4 months in 102 ft. of water. |
Sub S-4 in drydock showing damage |
Towing sub S-4 to Navy Yard. |
Sub S-4 being towed into Charlestown Navy Yard after being floated by pontoons off Provincetown. |