The caisson that seals the drydock. After the ship was moved into the drydock, this was floated into place then filled wiht water and sunk into a groove to seal the dock. Then all of the water was drained around us and our ship settled into the cradle that had been built before we got there. The depth measurements are in meters. | Travel | San Francisco | Hubbard Glacier | Parties | Icy Strait Point |Skagway | Dry-dock