| 摘要 |
The present disclosure relates to a semisubmersible unit (1) for use in offshore applications comprising a deck structure (2) adapted to be positioned above a still water level, a float (5) adapted to be located below the still water level, at least two columns (8) connecting the float (5) and the deck structure (2), such that the still water level will intersect the columns (8). The unit further comprises a cavity (20) provided inside one of the columns (8), the cavity (20) being at least partially delimited by a cavity wall (21) having an upper end (22) and a lower end (24) and a lower cavity opening (26) at the lower end (24), whereby the cavity (20) is arranged within the column (8) such that the cavity (20) extends over at least a portion of the height of the column (8) and such that the lower cavity opening (26) opens into the ambient water. The cavity (20) is adapted for launching and retrieving subsea equipment, especially an ROV (18), into respectively out of the ambient water. The disclosure further relates to a method for launching and/or retrieving subsea equipment into respectively out of ambient water from a semisubmersible unit (1), and to an arrangement and a method for launching and/or retrieving subsea equipment into respectively out of ambient water. |
