first person controller

Hi, i've added a first person controller (FPC) in my scene and at the same time ive added an rov as a child to the parent which in this case is the FPC. I've tried moving the camera away from its original location so that its location will be somewhere infront of the ROV to act as an 'eye' for the ROV however when i played the game, the camera will always be drop at the surface of the terrain or return to its original location. i also tried change the tag of the camera to player and it did work. Can someone explain why? Or how can i solve the issue without having to change the tag of the camera. Thank you