I was looking at the map of the undersea search area posted by Shadoko and then looked up the AIS information for the current position of Ocean Shield, which is approximately 21 S, 104 E. That longitude looked very familiar.
If you go north along the meridian to about 7 N, you end up within 25 nm of the IGARI waypoint (6.9367 N, 103.5850 E)
Just coincidence? If they do recover the FDR, the actual track is going to be very interesting.