The police, fire service etc will be in overall control of the situation. However they know nothing about medicine and will expect you to take charge on this matter. That means you tell them what you need them to do. If the patient's chest was crushed by a beam, you could tell them to lift it off to let him breath. Don't presume to tell the fireman how to lift a beam, that is his area of expertise. Just tell them what needs to happen and they will figure out how to do it. But they will be looking for you to save him and will accept your instructions provided they don't clash with more important considerations.When called to a remote location to do airway management, you, as the expert airway consultant, should expect to assume control of the airway at the time of your arrival.
Does it mean : you should expect they will LET you be the boss ( hopefully)
Student or Learner