Which system is used primarily for ground and water evacuation?

The Sked Rescue System is specifically designed for evacuation purposes, making it the appropriate choice for ground and water evacuation scenarios. This system is a flexible, lightweight, and highly portable rescue litter that can be used effectively in various environments, including uneven terrain and water. Its design allows it to be easily maneuvered and secured, providing a safe and efficient way to transport injured individuals.

In contrast, the other options serve different purposes. Ambulance aircraft are primarily for air evacuation, transporting patients from one location to another via air, whereas the Blue Force Tracker is a situational awareness tool used for tracking friendly forces on the battlefield. Combat net radios are communication devices utilized to maintain contact and coordination between units in the field, but they do not play a role in physical evacuation. Thus, the Sked Rescue System stands out as a dedicated solution for ground and water evacuation needs.