Safety is always a priority.  Team members need to be able to call for help if needed and as a result communication is key, particularly at large locations.  Seen here are four simple 12 channel two-way radios.  There are reasons other than safety for investigators to know each other's whereabouts.  When anomolous activity occurs, the initial step toward debunking or validating it may be to contact other team members to determine their location and whether they were potentially responsible.

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