How long will you be abroad? You can still keep contact with your T if it's not 4 years or smth. If it's a really long time you might want to find a new T at the place you're going to.

I'm in a similar situation now, training in another country for almost 4 months. My T suggested that I email her every week, we even agreed on a specific day, and that she will reply to the emails. That didn't work out so well (mostly because I'm more or less going crazy, lol), so now we agreed to have skype sessions. I'm not sure how will this go, since the first try is later this week.

Hang in there, everything will be ok