If it was a head-on situation both are REQUIRED to alter their course to the right to pass port-to-port. (Rule 14) Looking at the prop-wash in a more distant photo. This was a crossing situation, rule 15, where the US vessel had the Russian vessel off their starboard bow. The US vessel is give-way and the US vessel did not. The Russian was following the rules by standing on but broke the rules by not avoiding a collision or near collision with early and substantial action (maneuver) as this turned into a "Shall-May-Shall", last "Shall" situation.
So probably our ship did not want to turn, since it was recovering a helicopter. The Russians then later errored by not aggressively avoiding an elevated situation. Chicken.
I yield to your CG experience, but I’m confused by the video...
It appeared to me to be an “overtaking” situation rather than a “crossing”, in which, to my lubberly understanding, any vessel overtaking (Russian) any other shall keep out of the way of the vessel being overtaken (the US).
Since courses apparently weren’t parallel, does the course converging make it a crossing? Courtesy might dictate the bridge of a vessel overtaking another recovering a helo would give way out of safety to deck and aircrew considerations...
Just curious what a Coastie thinks...