Isn't the whole point of subs is that they can go almost anywhere undetected, Chinese or otherwise? Hence all the fuss about Russian subs (possibly) entering S

Isn't the whole point of subs is that they can go almost anywhere undetected, Chinese or otherwise? Hence all the fuss about Russian subs (possibly) entering Swedish waters over the last few decades, but no one being sure if it happened or whether the sub in question was actually Russian... https://en.wikipedia.org/wiki/Swedish_submarine_incidents#After_the_cold_war https://en.wikipedia.org/wiki/Swedish_submarine_incidents#Af... Though I doubt there is any foul play here at all...