This method of localisation is often referred to as a high line system.
The low line system is used on the majority of vehicles due to its lower cost.
Task force leaders were left to defend their hot line system as if they faced some sort of a consumer service scandal.
Generally a two line system of fortifications was used, about 50-200 meters apart.
France switched from its unique 819 line system to the more European standard of 625.
As a result the "above the line" system was implemented.
When there were open field battles, the Roman usually made use of a multiple line system in order to have reserves available.
They use their sensitive fingers, sense of smell, and lateral line system to find food.
They link up to the more familiar "land line" system of regular telephones.
Classified information should be unavailable over any temporary line system.