Which of the following is NOT an advantage of a double-hull tanker?

A double-hull tanker is designed with an outer hull that provides an additional barrier to the cargo hold, which significantly enhances safety features and structural integrity. The advantages of this design primarily focus on improving safety measures and reducing the environmental risks associated with oil transportation.

The increase in structural integrity comes from the additional layer of hull material between the cargo and the outside environment, allowing for greater resistance to damage, particularly in the event of a collision. This design also directly contributes to improved safety by minimizing the potential for spills during accidents. If the outer hull is breached, the cargo is still contained within the inner hull, thereby significantly reducing the risk of oil spills that could impact marine ecosystems.

Conversely, while double-hull tankers may have operational efficiencies, they do not inherently increase cargo capacity. The design features that enhance safety and reduce the risk of spills do take up space, which can limit the amount of cargo that can be transported compared to single-hull designs. Therefore, the assertion that increased cargo capacity is an advantage of double-hull tankers is inaccurate. Thus, identifying that increased cargo capacity is not an advantage showcases an understanding of the primary purpose and benefits of this design in tanker construction.