Guardian is a general communicator in AWIPS from software to user that can be personally configured in ways to reduce distractions of unimportant notifications and to enhance situational awareness. In AWIPS I, its strengths are noted most in local application usage, as the legacy communicator (Announcer) is still a bottleneck in the stream.
In AWIPS II, GUARDIAN is known as AlertViz, and has undergone some changes. AlertViz is very similar to GUARDIAN, but AlertViz takes advantage of the new AWIPS II architecture. MDL is in the process of ensuring AlertViz maintains all of the major functions of GUARDIAN, and improving upon it, when the AWIPS II architecture allows for improvements.