This Month´s Covers???.

Snapshot of the maritime activity on the Ligurian Sea. The fused high-frequency surface-wave (HFSW)radar tracks (blue) and their uncertainty ellipsoids can be superimposed to the automatic identification system (AIS) routes (red). For much more information on maritime surveillance, see our interesting article, "Maritime Surveillance with Multiple Over-the-Horizon HFSW Radars: An Overview of Recent Experimentation," by P. Braca et al. The article appears on pages 4-18.