bird dog
 n.Gloss: A person who guides an electrical crew to a repair site. «“There’s a lot of sign language for ‘don’t touch,’” said Andy Janosz, a switchman with PSNH in Manchester and the crew’s local “bird dog.”» —“Utility crews on scene in state speak 1 language” by Trent Spiner Union Leader (Manchester, New Hampshire) Dec. 19, 2008. (source: Double-Tongued Dictionary)

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