And who drew the line at actual endangering another ship?
Hazarding another vessel is fairly well defined, wolf.
That is a pretty low bar to set, and I am sure you would feel very differently if it was an American fleet and exercise that was being harassed and interfered with.
I saw it over and over during the Cold War with the Russians. And unless they actually hazarded the vessel, or (as they did in some cases) collided with the vessel, we in the US knew that this was part of the game of being on the high seas in international waters and having an adversary trying to gain intelligence on you.
The Chinese are now getting out on the high seas and will see the same. Again, if a vessel is actually hazarded, meaning there is a clear danger of collision if one or the other vessel does not take drastic action, and that action on both parts could still have them bump or collide, then that is grounds for very significant complain, censure, and warning.
In the US vs Russian case there were several times when sailors were actually killed in such antics...yet there was no war or firing. This led to the agreements that the US and Soviets made in the 70s to help avoid such drastic issues. it did not however keep vessels from gathering intelligence and interfering in exercise zones...it did establish clear rules about hazarding one another.
The Japanese operate very much on US doctrine and I imagine they are following those rules.
For example, if the PLAN deployed targets for naval gun fire or missile firing practice and the IJN ship put itself in between the Chinese fleet and those targets, would the PLAN be able to carry on with the live fire exercise? That does not create any navigational hazards by your extremely narrow standard, so is that not harassing and being provocative?
In that case the JMSDF vessel would be hazarding itself and no sane captain would do such a thing. The Chinese would also indicate in their release and publication regarding those firing zones.
just how would video of the ship sailing beside the Chinese fleet prove anything?
Come on Wolf, you are better than this. They could easily show their release to the public about their planned fire exercise, and then show the video with the time and date stamp, and the senor data showing the location. This would show that a JMSDF vessel hazarded itself by plowing into a planned fire zone in the manner you indicated.
What differentiate this from the normal kind of harassment from the IJN is that this time it seems the Japanese crossed the line from merely closely monitoring to actively interfering with what the PLAN was doing, and that was what drew the strong official reaction from Beijing.
You do not know that. The Chinese say they were provoked, but have not said they were collided with, hazarded, or that the JMSDF tried to collide with them. The Japanese say they simply monitored the exercise closely for three days.
If the Chinese want us to believe otherwise, show us the evidence. Damaged vessels, videos, data. If they do, and it is clear the JMSDF did this, then the censor holds and action should be taken and a captain relieved.
But if they do not, then we must presume that the Japanese ignored a PLAN zone on the high seas in international waters and that the JMSDF captain got as close as he could to fulfill his mission without hazarding or damaging anything.