A Patrol Base must be easily defendable and:

A Patrol Base must be situated away from natural lines of drift to minimize the risk of detection and potential enemy engagement. Natural lines of drift are paths or routes that might be commonly used by both people and wildlife, which can include trails, rivers, or other obvious paths. Setting up a patrol base in proximity to these routes increases the likelihood of encountering enemy forces, as they might be using these same paths to move or conduct operations.

By avoiding these natural lines of drift, the patrol base can maintain a lower profile and better conceal its position, which is crucial for maintaining operational security and enhancing the safety of the personnel stationed there. The location must support effective defense while limiting exposure to enemy movements.

In contrast, being close to supply routes or water sources is typically advantageous for logistics but can also increase visibility and the chance of confrontation. Proximity to enemy lines would obviously increase the chances of engagement, and while some situational awareness might be gained from being near water sources, it would not serve the primary purpose of a secure, defendable outpost. Hence, focusing on the positioning relative to natural lines of drift is vital for operational success.