If the double bottom cabinet is in the loading of different liquids need to be separated by the compartment for safety. The seats of the main and sub-planes in the cabin shall be strong enough to withstand the weight of the machine and the forces at operation. The central ribs and central beams shall be extended to the hull, and the steel thruster seat shall be able to withstand the vibration and weight of the thrusters and shall be tightly and robustly mounted on the hull structure.
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