Officer of the Watch (OOW) Certificate of Competency Practice Test 2025 - Free COLREGs Practice Questions and Study Guide

A Wing-In-Ground craft primarily utilizes surface-effect technology. This type of vehicle operates very close to the water's surface, creating a significant lift effect due to the cushion of air trapped between the wings and the water. This lift increases efficiency and allows the craft to travel at high speeds while maintaining a low altitude.

Surface-effect technology enhances performance by reducing drag, which is particularly beneficial for transportation over water. It combines aerodynamic principles with hydrodynamic effects, leading to improved fuel efficiency and the ability to carry heavier loads compared to traditional craft. In contrast, the other options refer to different principles that do not apply specifically to Wing-In-Ground crafts. For example, submersible technology is associated with underwater vehicles, fixed-wing design pertains to conventional aircraft, and hovercraft principles involve creating a cushion of air but do not specifically embody the characteristics and advantages of surface-effect technology used in Wing-In-Ground crafts.