Yes, FSX is required for Underway! and Underway_Captain! Captain! does not require FSX - it is standalone, and I recommend it for ships and subs especially. Land vehicles can use it as well.
Which mod of the A-7? That I do not know. The weapons are listed in the Underway! Manual. By and large Underway! does not affect any of the flight characteristics of FSX platforms (except by disabling equipment when a hit is made). We do have the ability to have varients of aircraft - ie we have the F-14A and F-14D with different loadouts/weapons. If you want a specific mod of the A-7, let me know which it is, and if you can point me to a link showing the weapons it carries we'll add it. I *may* have it in one of my books, but not too likely - especially for non-US platforms.
Which mod of the A-7? That I do not know. The weapons are listed in the Underway! Manual. By and large Underway! does not affect any of the flight characteristics of FSX platforms (except by disabling equipment when a hit is made). We do have the ability to have varients of aircraft - ie we have the F-14A and F-14D with different loadouts/weapons. If you want a specific mod of the A-7, let me know which it is, and if you can point me to a link showing the weapons it carries we'll add it. I *may* have it in one of my books, but not too likely - especially for non-US platforms.