Tail icing
DC-ATE: Why would you add 10-15 kts to your approach speed in a 737 if WAI was used? As far as I know that's NOT recommended for 2 eng ops ( only SE Vref Ice). Your stall warning logic for the entire flight will already have changed just by selecting it ON once. Your "home made" safety advice might end with a bad landing in the best case. A long landing on an icy runway in the worst case. My point: stick to Boeing procedures and you will be safe - or at least safer!!