With China's reform and opening up to further expand and foreign trade's further deepening, more and more special goods need to be transported into or out of china. Because of special goods usually has long overweight large features, for the handling and transport requirements are also getting higher and higher, the traditional operation and transportation is obviously can not meet the requirements. On these special goods, must from the spreader, lashing, operation and many other aspects were careful preparation and planning. Multi functional small ships, airship, tugs and other cargo, special cargo in a special class, because it has the lifting point difficult to grasp, cargo ship larger self-weight, uneven force characteristics, its handling and transportation way more complex.

This class of goods, usually over 20 meters in length, width of more than 5meters, the weight of 100tons and above. Because of the above goods cannot continue stacked with other goods, the general would choose mounted on the deck. The owner in the booking, the precise details of the cargo size, together with precise drawings to the owner for reference, size should be included in a hanging position, the position of the center of gravity, the weight of empty ship, center of gravity height, spacing and each rib position and other content, such as the actual size changes to promptly notify the owner. In the loading of cargo and sea transport, the owner must pay attention to the following points:

In the transport of goods, the best will not ship hull surface and fixed partial extraction, such as ship's antenna, waste drums, garbage storage barrels.

The boat all equipment, facilities, equipment for arranging and fixing the work, prevent the handling or voyage by boat shaking facilities within the movement, causing damage.

Before loading, the owner will be the best of each rib 's actual position marked on the submarine body surface, to attract owners attention. Because the majority of boat, boat freight is through the waterway near the boat from the water, and hanging up, so in the actual operation process will often mark the following rib positioned above the waterline, part.

Before loading, the main cargo minimize boat oil, water weight, prevent the hoisting process caused by the change of gravity and dangerous.

As owner of the boat body is arranged in the hanging point, must pay attention to, hanging point must be with ribs connected together, or in the operation for motorboat hull plate cannot withstand strength and tear hull.