Actually, looking at my Princess emails, the term they used was “premium” ocean view. I wasn’t quite sure which cabins qualified but wanted to exclude the forward facing ones. I’ve never been in one, but have read a couple reviews where the stewards did lock and unlock. A balcony for $15 seemed pretty cheap even if it was only in port. But my wife would not have been happy with that location.
Likewise, I was invited to bid on a “premium” balcony. Again, I wasn’t sure which those were, but really just wanted a cabin with a balcony that we could access while underway.