A lifeboat launch control system. The lifeboat launch control system has a wheel trunk that runs along the side of a ship. An axle box is vertically movable in the wheel trunk. The axle box has a pair of wheels on opposing sides of a bar. A shaft is removably inserted into the bar. The shaft is removable from the bar by a handle. When the shaft is removed from the bar, the lifeboat is released from the ship.

A lifeboat launch control system. The lifeboat launch control system has a wheel trunk that runs along the side of a ship. An axle box is vertically movable in the wheel trunk. The axle box has a pair of wheels on opposing sides of a bar. A shaft is removably inserted into the bar. The shaft is removable from the bar by a handle. When the shaft is removed from the bar, the lifeboat is released from the ship.

A lifeboat launch control system. The lifeboat launch control system has a wheel trunk that runs along the side of a ship. An axle box is vertically movable in the wheel trunk. The axle box has a pair of wheels on opposing sides of a bar. A shaft is removably inserted into the bar. The shaft is removable from the bar by a handle. When the shaft is removed from the bar, the lifeboat is released from the ship.

A lifeboat launch control system. The lifeboat launch control system has a wheel trunk that runs along the side of a ship. An axle box is vertically movable in the wheel trunk. The axle box has a pair of wheels on opposing sides of a bar. A shaft is removably inserted into the bar. The shaft is removable from the bar by a handle. When the shaft is removed from the bar, the lifeboat is released from the ship.

A lifeboat launch control system. The lifeboat launch control system has a wheel trunk that runs along the side of a ship. An axle box is vertically movable in the wheel trunk. The axle box has a pair of wheels on opposing sides of a bar. A shaft is removably inserted into the bar. The shaft is removable from the bar by a handle. When the shaft is removed from the bar, the lifeboat is released from the ship.

A portable gantry crane formed of composite members includes a composite material I-beam. Two or more support members are formed of a composite material and each support member supports the I-beam when the portable gantry crane is in an upright position. Two or more end housings are included, each end housing enclosing a top end of one of the two or more support members and coupled thereto using adhesive. A plurality of latch structures are coupled with the I-beam, each latch structure including a latch, and each end housing having a latch receiver, each latch in combination with a latch receiver allowing one of the latch structures to be releasably fixedly coupled with an end housing. In implementations a plurality of latch structures are coupled with the I-beam, each latch structure having a latch structure enclosure and each latch structure enclosure at least partially enclosing one of the end housings.

The invention relates to a davit arrangement (1, 20) arranged suspended over one or more boats or cargo devices (B, C) onboard a ship or similar vessel for launching or storing the one or more boats or cargo devices (B, C), the davit arrangement (1, 20) comprises a davit housing (19) having telescopically displaceable davit arm (3, 4, 5) and a hoisting arrangement (6) for hoisting and lowering the one or more boats or cargo device (B, C). The davit arrangement comprises a carrier (2) slidable connected to the davit arm (3, 4, 5), the hoisting arrangement (6) being further connected to the carrier (2), the davit housing (19) is connected to a turntable (10) for rotational movement of the davit arrangement (1, 20) around a center axis (A), the carrier (2) is adapted to be retracted to an innermost position where the hoisting arrangement (6) is aligned with the center axis (A) of the turntable (10). The invention further relates to a method for transporting a boat or a cargo device (B, C) using the davit arrangement and a davit arrangement system.

Provided is an apparatus for assisting in dropping an unmanned marine observation device, the apparatus including a support part installed on a ship, a column part installed to be movable in a horizontal direction relative to the support part, a first link member having the other end linked to an upper side of the column part, a second link member having the other end linked to one end of the link member, and a holding unit installed on the second link member so as to be movable in a longitudinal direction of the second link member, in which the holding unit is configured to hold an outer periphery of the unmanned marine observation device.

Provided is an apparatus for assisting in dropping an unmanned marine observation device, the apparatus including a support part installed on a ship, a column part installed to be movable in a horizontal direction relative to the support part, a first link member having the other end linked to an upper side of the column part, a second link member having the other end linked to one end of the link member, and a holding unit installed on the second link member so as to be movable in a longitudinal direction of the second link member, in which the holding unit is configured to hold an outer periphery of the unmanned marine observation device.

A method for locking the rope winch which is characterized by the fact that the locking bolt is inserted when the rope drum of the rope winch is stopped, first, through one of two holes in the first lug, then through one of the arched cuttings on the wheel of the rope drum of the rope winch, and finally through one of two holes in the second lug, Then the locking bolt is secured in position with a nut.