This might be phrased somewhat vaguely, but if it is just say so, and I will try to add more information without giving it away. Even so, though, you guys will probably get it right away.
In a somewhat related vein, the Jupiter/Langley was one of a 4-ship class. In addition to being the only one converted to a carrier, what else made her different from her sister ships? Not so much something about what the Jupiter was as what she wasn't.