V,
My backup plan is to make sure someone is collecting our mail if we don't get it. That way, if it arrives while we are at sea and we need it, someone can overnight or 2 day it (some countries will take two days). Most emergencies that would happen, you can't necessarily fly out that same day anyway - even if you are within the States. Also, I think if the passport agency has your application (and has had it for 8 weeks), and you suddenly need it, the U.S. embassy would be able to quickly process it since it would already be in the system. I would make sure you have those birth certificates handy just in case! Before our January cruise, I thought I knew exactly where it was and about 2 weeks before the cruise, I went to go get it and it wasn't there!

I had to turn the house upside down to try to find it. Very stressful! We are going tomorrow to get the kids passports and mine...I have to make up some story to the kids as to why we need them since they don't know yet about the cruise. Anyone have a good fib?
Lisa