What are the two expandable bin type revetments commonly encountered in the field?

The correct choice identifies two types of revetments commonly used in military and defense applications: Steel Revetments and HESCO Containers.

Steel revetments are constructed from strong, durable steel materials that provide effective protection against various threats, such as small arms fire and shrapnel. They are designed to be robust and can be easily transported and assembled in the field, making them practical for rapid deployment.

HESCO Containers, on the other hand, are wire mesh containers lined with a geotextile fabric and designed to be filled with soil, sand, or other materials. They are particularly favored for their ease of assembly and versatility, allowing for quick construction of protective barriers that can be expanded as needed.

Together, these two types of revetments offer a reliable solution for fortifying positions, increasing safety, and protecting personnel and equipment in combat or operational environments.