bird dog
n.βGloss: A person who guides an electrical crew to a repair site. Β«βThereβs a lot of sign language for βdonβt touch,β” said Andy Janosz, a switchman with PSNH in Manchester and the crewβs local “bird dog.”Β» ββUtility crews on scene in state speak 1 language” by Trent Spiner Union Leader (Manchester, New Hampshire) Dec. 19, 2008. (source: Double-Tongued Dictionary)