Abstract: A floating installation, including a main moonpool (1), wherein in the main moonpool (1) there is arranged a bulkhead (4) which divides the moonpool (1) into a first section and a second section. The bulkhead (4) forms a first wall in a compartment (16) in the first section. The compartment (16) is also defined by the walls of the moonpool (I) and a floor (7). The bulkhead (4) is designed to be opened to provide communication between the first section and the second section. The compartment (16) is substantially watertight when the bulkhead (4) is closed.