Boom Description Meanings: Page 4 of the Hamilton Conventional Focus Packet

Hi everybody. I'm new to lighting design and I'm using the project do dive into it. It is such a great opportunity presented by ETC.

I was wondering what the Page 4 (of the conventional focus packet) Boom descriptions indicate? It may be a simple question, but I want to confirm what it means. For example on this page is says, "Boom 1 DS: Smoke Pocket US: Off Near Post". Does this indicate the boom locations? Does it mean there are two pipes at each boom, one upstage and one down?