Tankers are a type of transportation used for carrying large amounts of liquid materials, primarily oil and gas. They are essential in the global energy trade, responsible for delivering around 2.8 billion tons of oil and gas each year. The history of tankers can be traced back to the late 19th century, when the first commercial oil tanker - the Zoroaster - was built in the United States. Since then, tankers have undergone significant technological advancements to accommodate the increasing demand for oil and gas transportation.