Ha-HAAAAH!!!! Proves how much you know, Sandy me bhoy! 😉 :p
That’s exactly where it comes from – that way the sun wouldn’t be shining directly through the cabin window (or porthole on the lower decks) on the journey through the tropics, resulting in a cooler cabin.
A higher charge was levied for this privilege, and the tickets were endorsed P.O.S.H. – and thus it was that the word “posh” entered our fair tongue.