I'm writing a sci-fi script for a T.V. pilot (my first) in which there is, initially, an AI (that runs a spaceship) with no avatar (that comes later). It is not a narration when that "character" speaks but, obviously, not seen although it is present in the room. Should I use (V.O.) or (O.S.)? Like so? This scene takes place inside the spaceship.
AI (V.O.) I am the ship's artificial intelligence system. I manage propulsion, navigation and other functions.
Also, for shots that take place outside of the spaceship that includes a view of the spaceship with the characters inside speaking but not seen, I would think that (V.O.) would be better suited for the dialog as opposed to (O.S.) but I can see the case for both.
What is the proper way to write the script indicating these types of dialog?