Steven Holste of SPAWAR demonstrated a map based Command and Control system developed for the USMC, called the TACtical Situation Awareness Tool (TacSAT). It is based on the widely used Pad++ system developed with DARPA funding. (Note: Pad++ is implemented in TCL/TK. It would be interesting to see some of the functionality implemented in Java.) The system provides a raster format map (based on ADRG format data) with continuous zoom, and a means of placing and viewing military symbols and markings on the maps. The unit locations, status, etc are tied to electronic reports sent via radio. It makes good use of the ‘info lens’ (a.k.a. magic lens, semantic lens) concept implemented in Pad++. An ‘info lens’ is a frame that is dragged across the display area. The area within the frame is filtered such that more or less data is shown than in the outside display area. This is a very powerful and intuitive tool, well suited for a combat operations center.