The Israeli pilots were (for the most part) trained in the US and spoke English. They identified the USS Liberty with the Stars and Stripes bolding waving in the Med sun as an American ship. They knew she was the American spy ship.
After several strafing runs on the ship (can’t remember exactly how many) a group of special forces type Israelis came out with the intention of sinking the ship.
The US has no obligation to apprise or get permission from anyone for any US vessel as long as the ship is in international waters and the USS Liberty was in international waters.
In God we trust, everybody else we monitor.
You got a source for all that?
Take your time, I know you’re in Thailand.