[0] https://www.popularmechanics.com/military/navy-ships/a263440...
(The parent comment said "It weighs 50 tons and is 51 feet could anything really mess with that?" An EP-3 weighs 67.5 tons and is 105 feet long.)
The same applies to submarines and a net around the propeller.
(It's also a good example of the sort of diplomatic fuss that ensues after this sort of incident, too.)
Posting a link to a completely unrelated article with 0 explanation is idiotic, especially when there are plenty of examples of incidents that actually involve submarines.
Throw a steel cable into its prop, get too close using another sub or two, etc.
If you can capture an autonomous submarine just by throwing a net over it, then presumably you can also capture a manned submarine in the same way? What difference do the bodies inside make in terms of being able to capture it? Just better at evading?
And losing a submarine compared to losing a submarine and the people inside it seems a better deal, doesn't it?
I really don't. Switch the nationalities and my answer is the same - self-defense when human lives are at risk is a lot more justifiable than self-defense of a robot. People are worth more than electronics.
Is it also justifiable to use deadly force in the response to actions not involving deadly force and only hypothetically putting lives at risk?
Because this is what you said in your original comment.
Armed, unmanned robots change the calculus on both sides of an engagement.
If a Chinese fishing trawler "accidentally" drops a net on one of these and "rescues" it, can it defend itself? Should it?