To pick up on what TB posted above, while Article I, Section 8 empowers the Congress to raise and support armies, it empowers the Congress only to maintain a navy. While it additionally limits the Congress to appropriating money for raising and supporting armies for only two years ata time, there is no such limit placed on maintaining a navy. Of course, as written, the Constitution does not authorize an Air Force or the President as its Commander in Chief.

So much for strict construction.