What is the primary benefit of surface-effect action in WIG craft operations?

The primary benefit of surface-effect action in Wing-in-Ground (WIG) craft operations lies in the creation of increased lift and reduced drag. When a vessel operates close to the surface of the water, the aerodynamic lift is enhanced due to the ground effect. This effect occurs because the proximity to the water surface changes the airflow pattern around the craft, allowing it to generate more lift for a given speed, thereby elevating the craft above the water.

In addition to increased lift, this operating environment also leads to a reduction in drag. The ground effect decreases the induced drag that normally occurs when a craft generates lift. As a result, WIG crafts can travel more efficiently and at higher speeds compared to conventional vessels that do not utilize this effect. This combination of increased lift and reduced drag results not only in improved performance but also contributes to the overall effectiveness and speed of the WIG craft, making it an appealing option for various operations.