@dymaxion @wonka @graydon @dr2chase @cstross
passively limited to an initially set kill box.
Homing torpedoes, in contrast, need navigation capabilities to be able to use a kill box. But the idea is quintessentially the same as a mine field - the torpedo will try to kill anything it finds in the kill box (possibly with additional sensor profile parameters), but it will NOT try to kill something outside the kill box.
This system isn't perfect, but it's a starting point.
2/2