It might be a good idea for you to read this earlier post of mine: Damage analysis: the Fitzgerald was moving at higher speed than the ACX Crystal was..
If, after reading it, you still believe the Fitz was sitting still, please enlighten me.
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I have no dog in this fight; just using my analytical abilities to extract as much intelligence from the limited available information as possible...
I questioned it as my one and only experience on any ship other than my boat, it was in constant motion. Did slow way down after dark, but always moving.