GreatBear (post 1881), I think the June 16 position of the ships is centered on where the floating wreckage has drifted, which may be some distance from the area of impact.
The plot of the wreckage recovered June 6.
The plot of the wreckage recovered on June 7.
The plot of the recovery of the bodies, the last recovery (the 50th body I believe) being on June 16th, which is where the Brazilian Navy now has most of its recovery flotilla.
The plots appear to show a north and then a west drift. The center of the search (as of June 16) is about where 145 [km] appears on the third chart.
Without an identifying coda or index, the numbering system lacks obvious coherence. Of note are items 9 and 11 near the bottom of the June 7 chart. Did these drift south or do these represent the first pieces of the plane to come off? (The square at the bottom of the frame in the charts for June 6 and 7 is the last reported position.)