The ship was sunk in the graving dock in order to clean her.
To accommodate the larger paddlewheel steamers, the entrances to the basin and graving dock were made 80 feet in width.
It has docks, and a graving dock, and is a port of call for vessels of all nations, with a thriving commerce.
Parliamentary powers were obtained to construct a graving dock capable of accommodating the largest class of warships.
Like a sliding or rolling caisson, it provides a bridge for crossing over the entrance of the graving dock when in position.