Abstract: A dock and pool device stowable in a space in a ship comprises a collapsible pool portion (21) with a frame (24-27), which when erected stretches out nets, defining the bottom and four sides of the pool. The frame can consist of two rectangular frame sections (24) forming the longitudinal sides, two transverse frame sections (25) hinged to the longitudinal sides and forming the short sides, said sections each comprising two halves (25a) hingedly interconnected along a vertical joint at the longitudinal centerline, and a least two section halves (26) forming the bottom of the frame. These can be hinged together along or at a symmetrical distance from the longitudinal centerline of the pool and be hinged to the respective adjacent longitudinal side section (24). The frame has also hoist means by means of which the pool (21) can be hoisted off and into the ship and for erecting and collapsing the pool.