While I was at the TSOD, I took a tour with a guide I hadn't been with before. He described the "locked gates" as gates to where the food storage was located, and that the gates were locked to keep the third class passengers (and perhaps communicable disease) out of the foodstuffs. I invite any of the cast members who lurk here to comment on this as I had never heard of this before. But I do believe the locked gates had to do with cargo, and not with keeping third class passengers away from the lifeboats.
I don't know either , but I am just going to guess there is one near the second class stairwell on E Deck , or on scotland road by the first and second class galley entrances midships.So were there GATES? No one really answered my question. I know that no one really knows the truth but I wish I knew if maybe there were.