Which of the following is NOT typical of double-hulled tankers?

Double-hulled tankers are designed with an additional layer, or hull, which serves several important functions. One of the primary advantages of this design is that it significantly enhances safety and environmental protection. The presence of the two hulls reduces the risk of spills in the event of a collision or grounding, as the outer hull can contain breaches in the inner hull, thus keeping the cargo secure.

In terms of stability and safety features, double-hulled tankers typically provide improved stability due to their design, which distributes weight more effectively and lowers the center of gravity. This contributes to better handling in turbulent conditions and enhances overall safety during operation.

However, while double-hulled designs offer these advantages, they do not inherently increase the cargo capacity. In fact, the additional structural elements can sometimes reduce the space available for cargo, as the space between the two hulls does not contribute to cargo capacity at all. This distinction is why the option indicating increased cargo capacity is not characteristic of double-hulled tankers.