Can you tell me the dreams that Winston has in the book 1984?

's
dream is about his mother and sister.  He dreams that his mother and sister are on some kind of
ship.  The ship is sinking, and Winston knows that they are going to die on board that vessel.
Winston is watching this from an outside view because he himself is not on the ship (he is
somewhere sunny and nice and safe), but still able to watch them die.

"He was out in the light and air while they were...