Here on the East Coast US we call two bow anchors set 180* from the other a Bahamian moor. It's a common method of anchoring in the Bahamas because of the switching currents through the passes on the bank. We often had trouble with it because of our fin keel, which would catch the slack rode if we turned too slowly (or was it too quickly?).
The worst problem with a Bahamian moor was when we were in Nassau Harbor and a waterspout came through. By the time everything calmed down, our two anchor rodes were so hopelessly tangled that we buoyed them and reanchored elsewhere with our third anchor. Peter then spent several hours diving on our primaries to untangle them so we could get them up. However, waterspouts are relatively rare. Friends of ours were in Nassau Harbor for several months and they dragged anchor one night (never happens during the day, does it?) because, as it turns out, after many cycles of swinging 180*, the swing didn't reverse itself - clockwise one way, counterclockwise the next time - and two or three clockwise swings circled the chain around the anchor and it tightened, closed the loop, and up came the anchor.