WIG crafts are primarily characterized by their ability to do what?

WIG crafts, or Wing In Ground effect vehicles, are specifically designed to operate using the aerodynamic lift generated by their wings when they are in close proximity to a surface, such as water. This phenomenon is known as ground effect and allows these vehicles to achieve efficient flight over water without fully leaving the surface, thereby combining the characteristics of boats and aircraft.

This unique capability means they can travel at high speeds while conserving energy, making them efficient transport options for both passengers and cargo over waterways. The design and operational principles of WIG crafts emphasize this surface-effect lift, distinguishing them from other vehicles that operate solely on land, in the air, or underwater.

The other options do not accurately describe the operational characteristics of WIG crafts. They are not primarily designed to travel on land, they do not function like traditional aircraft flying efficiently over bodies of water in a standard manner, nor are they intended to submerge underwater completely, which further highlights the uniqueness of the lift mechanism that defines their operation.