I think they have said if not mistakenAround 275 - 300 metres in depth is the deepest!
Lidar has picked up more faults I think there was 5 or 6 now there is with the LIDAR Done about 15 or 16 plus off shoots of the faults themselves , like splays or something! And since the iceberg is melting more each successive year there is more lateral extent they can access as well. I would only assume that , as it makes sense.
80% unexplored I think they mean the WHOLE TACO!!!!