The first box found and recovered is the FDR.
USNS Grapple has been running a pattern over the bottom ranging from where the FDR was recovered in 150 feet of water and also an area a bit west where the depth is 2,300 feed deep. I wonder if the CVR's pinger is still operating. It is supposed to work for about a month. There must be something of interest in the deep water.
The Grapple's recent path can be seen here:
Live Ships Map - AIS - Vessel Traffic and Positions