So, the official teaching is that baptism saves JW's from Armageddon (1 Peter 3:21), in the same way that the ark saved Noah (Jesus - not sure why Jesus needs saving, though), his wife (the remnant - WT Aug 15, 1990) and the six others (the other sheep - WT Sep 1, 1989).
Jehovah himself shut the door of the ark, and after seven days, the rain started to fall. This shutting of the door corresponds to the start of the G.T., afterwhich no one can become baptized and saved, but must live with their personal agony throughout the G.T., knowing that they were this close to being inside the ark.
Now, let's say that the G.T. starts on the third Saturday of April, 13:00 (1:00 PM) Greenwich Time, and the G.T. begins in full swing earthwide simultaneously.
Those who were at their S.A.D. that Saturday morning, and were dunked prior to 13:00 (1:00 PM) Greenwich Time are inside the ark.
What about those a few time zones later?