47 - that's my guess. Gone 360 days out of 365, missing Thanksgiving, Christmas, all the kids' birthdays......and when you *are* home with them, you're more of a strange uncle to the kiddos than a Dad, because they hardly know you.......
I used to keep pics of Beez pinned up all over my son's room while Beez was on WestPac, just so the face would still be familiar to a 1 year old - and that was only for 6 months.