The untraditional target set (i.e., small slow-moving or even static surface targets) can apparently be challenging for doppler radars designed to take on high end threats.
In summary, the lower approximation of a target set is a "conservative" approximation consisting of only those objects which can positively be identified as members of the set.
The ships commanding officer would exchange plaques, objects and photographs with the city or town that reached the target set, and an "adoption" would begin.
Special conversion routines had to be used to convert from one character set to another, often resulting in destructive translation when no equivalent character existed in the target set.
