What is it?
But first a little side story.
This is about my experience or lack of it with the rig. A friend of mine owns a Junk, yes a real one. Born in Hong Kong, I do not know how she ended up here. A 3 masted vessel with a typical Chinese Junk set up. The first mast right on the bow and inclined forward followed by the 2 other spars. Invited aboard, the two of us went out for an afternoon sail. The breeze was light and soon we stopped the engine to be on our way. It was not long before we had to tack in order to avoid running into Fort Adams. This is when the owner told me that we have to start the engine, otherwise the boat will not come over. Surprised I said "Why not?" Simply, she won't come about with this light breeze was his answer. I asked him to let me try. So, we did and the tack was achieved in a smooth way with no problem. The end of the story is that for the rest of the time we could not change course without having to start the engine. Beginner's luck! yes but leaving me with a poor impression for the whole lot.