I think the tube interpretation makes the most sense. Actually, "all" tubes most likely means three or more; if there were only two tubes, then "both tubes" would have sufficed. You wouldn't say that you're going to shoot someone with "all barrels" of your double-barreled shotgun. No, the phrase that you'd use is "both barrels." You can watch the Enterprise fire a full spread of six torpedoes at about 1:55 of this compilation of the remastered FX: [yt]http://www.youtube.com/watch?v=NdKGl5Y141A[/yt] Also, the writer of "Journey to Babel" is a she.