I'd love to write something witty in reply but my mind just cannot cope with the enormity of the question....Id.
Deck one is always at the bottom of the ship and thus ....
I'll have a go at answering......
the 4th deck is the..... 4th leve.
You can get a copy of the Cunard brochure which should have a plan of all the decks in the details of the Queen Victoria.
Cunard also have an interactive guide to the decks of the Queen Victoria. You can see this at http://queenvictoria.cunard.co.uk/the-ship/interactive-deck-plan-2.htm.