Gibraltar Harbour's air lock diving-bell plant, or caisson diving bell barge, was a purpose-built barge for the laying, examination and repair of moorings for battleships. It was designed by Siebe Gor
The barge as depicted in a painting by Charles Pears
Pictured on trials at Wivenhoe 1902
A cross section of the mobile air lock diving bell
Working inside the bell on the sea floor
An airlock is a room or compartment which permits passage between environments of differing atmospheric pressure or composition, while minimizing the changing of pressure or composition between the di
An airlock on board Space Shuttle Atlantis
An early airlock, with decompression instructions
US Navy submarine diving lock out
STS-103 closing the airlock