The Ady Gil altered it speed which puts it at fault.
“The Ady Gil was the stand on vessel as the Japanese vessel was crossing on the Ady Gil’s port side. The Japanese vessel was the give way vessel and should of either stopped or passed on the Ady Gil’s stern.”
While this is true, having the right of way does not give you to demand the right of way if it will cause a collision. if the Ady gill did not accelerate that would not have been a collision.
Both vessels were at fault. Ady Gil did not have the “right away” but according to NavRules was the stand on vessel meaning it had to hold course and speed. If the Ady Gil altered its speed then it held a percentage of the blame for the collision.