One of the hardest responsibilities a new manager has is asserting their authority to their employees.  Many come across as too mean or overbearing, but when they back off they can seem like a pushover.  A helpful tool is to create a list or diagram about what the manager has authority over and what areas they cannot control.  Sometimes there can be a gray area that new managers can get lost in, so it is important to outline these things in the beginning.  Also let the manager know who they can come to if they run into a problem, whether it is you or another person in command.  Don’t throw them to the sharks without a life preserver.