The text discusses the use and importance of container ships in the shipping industry. Proper approval, securing, and computer-controlled movement of containers is necessary for their transportation on deck. These ships, similar to buses and trains, transport a variety of goods and products worldwide on fixed routes. The book "Introduction to Container Ship Operations and Onboard Safety" provides an overview of container ship operations for professionals in the maritime industry. The handling gear for loading and unloading containers includes a series of conveyor belts. These ships also play a vital role in maintaining supply networks and efficient transportation of goods and materials.