Shipping is the best way to send heavy goods or in large quantities without time limit. But this method has its disadvantages and is slower than other methods. Also the dangers of the route and its inflexibility and the weather are very impressive. And the cost of fuel and port taxes. And it is very difficult to track goods. It should be noted that the cost of sea transportation is a cheaper method with price stability than other ways. In addition, with the increasing development of the shipping industry, unloading cargo is possible quickly. In maritime transport, it is possible to transport up to 500,000 tons of cargo easily. In maritime transport, there are various methods and different ships that are adopted for its suitable goods.