With more refined data, the search for MH370 has moved northeast by 700nm, and has sighted new debris. The Malaysian MoT has said that ocean drift means the debris sighted “could still be consistent with” the earlier debris fields. That’s not particularly credible, given the source and the fact that the search has been shifting to the SE to track the currents.
So, what does this mean for the Southern Ocean? It means that in any two or three areas, chosen more or less at random (random from a selection of the water standpoint, not geolocation), you can expect to find upwards of 500 pieces of flotsam that are visible from orbit.