I just got back from vacation and took the advice of many and wore my Seamaster through the metal detectors at both Logan and Orlando. No problems at all. My younger son set it off with a back brace he has to wear mostly made from plastic ( fractured his vertebrae playing football ) I could swear there is more metal in my watch than the brace. Down in Orlando they actually put him in a glass box and treated him as a terrorist. Anyway, wearing the watch through screening is the definitely safest way to go.