Every compass ... will suffer from local deviation effects, due to local magnetic interferences ... - almost any ferrous or magnetic object. These effects will vary at different points of the compass, for example only a degree or two at a due north heading, and 5 or 6 degrees at an easterly heading.
Well....prime time lineup, that is. We'll have to wait for the late night one. ;-) MON: Chuck, Trauma, Law & Order TUE: The Biggest Loser (2hrs), Parenthood WED: Mercy, Law & Order: SVU ("Encore" - or as I like to call it, "rerun")