Answer:
Along a specific line of communications
Explanation:
The route reconnaissance obtains detailed information about a specified route and terrain where the enemy could influence movement along a specific line of communications such as a road, railway, or cross-country mobility corridor. In the army, route reconnaissance also includes involves obtaining information on a specific route or terrain where the enemies can influence movement, it provides updated information on route condition. With the advert of advanced technology, drone planes with cameras are deployed in route reconnaissance.