That's correct CRJ, they are pretty flexible with how you use your vacation days. Some guys take 2 days Vacation every month on top of their 10 days (11 days with AJV) to make at least 12 or 13 days off every month. Generally the leave is taken in 2 blocks of 12 though, and as you said, added to your days off but within reason you can request what you want.