A control device of a hatch or shutter or door for closing and sealing openings in marine vessels or ships, comprising - a hatch or shutter or door having a shutter edge; - a frame which can be associated with an opening edge which delimits a deck or floor opening of a vessel or ship deck or floor; - a closing and opening mechanism for closing or opening said hatch or shutter or door to said frame; - said closing and opening mechanism comprising, associated with said shutter, at least one closing rod which passes, in operating conditions and when said hatch or shutter or door closes said opening, from an extended position to connect or lock said hatch or shutter or door to said frame, to a retracted position to free or unlock said hatch or shutter or door from said frame, and vice versa; - said closing and opening mechanism comprising, associated with said frame, at least one closing block which delimits a closing rod housing or narrowing adapted to receive said closing rod when in the extended position to connect or lock said shutter to said frame; - said closing and opening mechanism comprising an opening lever operatively connected to a toothed pinion adapted to rotate about a pinion axis; - said closing and opening mechanism comprising at least one rack connected to at least one closing rod; said rack meshing with said toothed pinion; said rack comprising at least one slotted rack housing which slidingly constrains said rack to said shutter thereby transforming said rotary motion into said extension or retraction movement of the closing rod; wherein - said closing rod comprises a rod housing; and wherein - said closing and opening mechanism comprises a safety or locking mechanism; wherein - when said closing rod is in retracted position and said shutter is open, i.e. with its shutter edge away from said frame, said safety or locking mechanism selectively engages said rod housing thereby locking said closing rod in retracted position; characterized in that - at least one closing rod has said rod housing which comprises at least one rod groove; and wherein - said rod groove is selectively engaged with a locking element; and wherein - said locking element comprises a locking housing; and wherein - said locking housing comprises a first locking housing portion or narrow portion which selectively engages in said rod groove thereby creating a bilateral constraint to the said closing rod and locking the sliding extension thereof; and wherein - said locking housing comprises a second locking housing portion or widened portion which disengages from said rod groove thereby releasing said closing rod and allowing the sliding extension thereof. - a hatch or shutter or door having a shutter edge; - a frame which can be associated with an opening edge which delimits a deck or floor opening of a vessel or ship deck or floor; - a closing and opening mechanism for closing or opening said hatch or shutter or door to said frame; - said closing and opening mechanism comprising, associated with said shutter, at least one closing rod which passes, in operating conditions and when said hatch or shutter or door closes said opening, from an extended position to connect or lock said hatch or shutter or door to said frame, to a retracted position to free or unlock said hatch or shutter or door from said frame, and vice versa; - said closing and opening mechanism comprising, associated with said frame, at least one closing block which delimits a closing rod housing or narrowing adapted to receive said closing rod when in the extended position to connect or lock said shutter to said frame; - said closing and opening mechanism comprising an opening lever operatively connected to a toothed pinion adapted to rotate about a pinion axis; - said closing and opening mechanism comprising at least one rack connected to at least one closing rod; said rack meshing with said toothed pinion; said rack comprising at least one slotted rack housing which slidingly constrains said rack to said shutter thereby transforming said rotary motion into said extension or retraction movement of the closing rod; wherein - said closing rod comprises a rod housing; and wherein - said closing and opening mechanism comprises a safety or locking mechanism; wherein - when said closing rod is in retracted position and said shutter is open, i.e. with its shutter edge away from said frame, said safety or locking mechanism selectively engages said rod housing thereby locking said closing rod in retracted position; characterized in that - at least one closing rod has said rod housing which comprises at least one rod groove; and wherein - said rod groove is selectively engaged with a locking element; and wherein - said locking element comprises a locking housing; and wherein - said locking housing comprises a first locking housing portion or narrow portion which selectively engages in said rod groove thereby creating a bilateral constraint to the said closing rod and locking the sliding extension thereof; and wherein - said locking housing comprises a second locking housing portion or widened portion which disengages from said rod groove thereby releasing said closing rod and allowing the sliding extension thereof.