Guy or Man or Woman who is reached by almost continuous communication through some kind of technology, and provides quick analysis or information about items, logistics, technology, people and the situation to those who are locally involved. They can drive remotely controlled equipment and vehicles and give general view over what is going on at the surveillanced area during any kind of operation. Usually they are afar from the operation in a safe-zone, where they can focus on being the second-mind or the external-addon. This activity usually involves a chair on which they sit infront of a computer, radio, map, controller. The expresion is popularized in the movie Spiderman: Homecoming
A typicial conversation:
-Alpha-delta, we need access to the main room.
-I read Tango. Initiaing hacking of the security protocols. Access gained in 30seconds. (Guy in the Chair)
Examples:
Siperman: Homecoming - Ned
Matrix - Tank
Mission: Impossible - Luther Stickell