How is a tank ship characterized?

A tank ship is characterized as self-propelled because it contains its own power source, allowing it to navigate and maneuver without the need for external towing or assistance. This self-propelling capability is essential for tank ships, particularly when they are transporting liquids, such as oil or chemicals, over waterways where precise navigation may be necessary.

The design of a tank ship is specifically focused on efficiently transporting large quantities of liquid cargo, and this requires integrated propulsion systems that provide the ability to travel autonomously. The distinction is particularly important, as many other types of vessels might rely on tugs or other vessels for movement, while tank ships are equipped to operate independently in various marine environments. Understanding this characteristic helps in identifying the functional capabilities of tankers in maritime operations.