I bought mine in 2002 and 17 years later I finally realized that the second time zone can be configured to a 30 minute differential; for those countries who insist on being different. I had my battery replaced today and went through the instruction manual and its myriad steps. After I finished I ran through the time functions to ensure I did everything correctly. In the T2 function I set GMT and noticed it was 30 minutes out of whack compared to my local time setting. Since the battery change was done at a non-Breitling facility, the first thing I thought was oh-oh.
Anyway, going over the instructions again for setting T2, I turned the crown slowly and noticed each single click moved the digital display in 30 minute increments. My instruction booklet does not mention this. Please tell me I am not the only Aerospace owner in the world who did not realize this.
I've read that some countries even set their local time 15 and 45 minutes off from GMT. If you are in those places, you are on your own, the Aerospace can't help you. Better yet, it's probably best to not go to those "special" places in the first place.