I haven't done a TA myself, but I've experienced other places where the internet was flaky. But from posts by others, it could be spotty, but not totally nonexistent. You may have to find times of the day (or night) when fewer of your fellow pax are not on line, so the bandwidth is not completely clogged. I'd guess that when there are a lot of sea days, many folks are on line, overwhelming the bandwidth even if satellites are plenty.