All items necessary for prolonged operations should be taken into positions upon initial employment. Consider the time and effort spent moving into the area undetected, then having to leave the area to get something which was forgotten. The more movement, the greater the chance of detection. Ensure extra batteries are available . Also have frequencies and call-signs for all necessary communications during the operation.
Extra batteries are a priority.
The shortest route may not be the best route. We never know what effect our presence may have on a suspect. If it might have an adverse effect, don't be seen. Both members of the team must be aware of their priorities when the suspect is in the sights. The sniper will maintain target acquisition on the greatest threat.