Not right away, but many have this:
Code:
[Sensor 9]
NodeName=R01
LinkName=Type13
StartDate=19421001
EndDate=19430901
in their sns file.
That is an air-search set. The problem is that it also seems to detect ships as a bug. It isn't as effective though. Oddly, some people reported always having DDs head right at them, where I have trouble getting them to notice me.