An observer must be able to self-locate to within what distances if degraded by lack of position locating systems?

The ability of an observer to self-locate accurately is critical, especially when position locating systems are unavailable or not functioning optimally. If the observer must be able to pinpoint their position precisely, they are required to do so within a close range, ensuring that any data relayed regarding coordinates is reliable for targeting and other operational needs.

In this context, the requirement of self-location to within 10 or 100 meters reflects the operational necessity for accuracy in a combat environment. Being able to locate oneself within 10 meters is crucial for precise targeting, while 100 meters provides a reasonable buffer for situational awareness. This level of precision is essential for safe and effective fire support coordination.

While other options suggest different distance parameters, they extend beyond the acceptable limits for tactical effectiveness and fail to meet the critical need for accuracy. A larger distance variance, such as 150 or 250 meters, can lead to significant errors in targeting, which could compromise mission success and safety in the field.