Kernel tinification

I haven't the reference ready, but I think it was in CACM's "Inside Risks" column, late in the last century: some computer at a port (of the naval kind) crashed repeatedly. It took some time to realize that the crashes came at a bi-weekly schedule. From there it was relatiely easy to correlate the crashes with the (regular) arrival of one military ship: its radar machinery confused the electronics of said computer.