USS John S. McCain
The Navy has issued news releases about these two collisions you can find here. Also included are links to the investigation results, photos, videos, and collision map graphics. (I had no luck with the links.)
Navy Releases Collision Report for USS Fitzgerald and USS John S McCain Collisions
Chuck Hill's CG Blog 
Professional mariner opinion. http://gcaptain.com/us-navy-memo-back-basics-outdated-ridiculous/
Some interesting thoughts here. https://blog.usni.org/posts/2017/11/08/jungian-5
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Some good commentary here. https://www.defensenews.com/naval/the-drift/2019/02/09/we-need-to-talk-about-the-fitzgerald-the-drift-vol-xvii/
I would observe that there were an awful lot of people responsible here, and note that when everyone is responsible, the result is that no one is responsible. In this case apparently also no one was properly trained.
Apparently the Navy did decide they should turn on their automatic Information Systems (AIS), at least when transiting high traffic area. https://gcaptain.com/u-s-navy-ships-to-turn-ais-transmitting-on-in-high-traffic-areas/