One of the key economies in QE2's construction was that the decks were built flat and without the conventional long parabolic lines of sheer that turn the decks up slightly towards the bow and stern as a means of maintaining a constant freeboard height as a ship inevitably pitches fore-and-aft while in motion at sea. As an added safety consideration for her North Atlantic role, the forward decks were, instead, sloped upwards in a straight line from a point just ahead of the main mast to the bow, and those aft, towards the stern, from about where the Quarter Deck lido ended. James Gardner superimposed a beautifully curved sheer line where the contrasting hull and superstructure colours meet on the ship's sides, bringing it up across the Two Deck porthole line and around the curved top of the bow. The lesser slope, aft, was compensated by the tapered glazed windscreening above.