4 ms·Some of them can. Others are no more than a gyroscope linked to the rudder.by mikeash 8y agoSome of them can. Others are no more than a gyroscope linked to the rudder.ceejayoz 8y agoSure, but that's like pointing out that Toyota Corollas exist.mikeash 8y agoIn the context of a conversation where people say “car” implies something capable of 200MPH, that would be worth pointing out.