Look about like any other freighter to me.
The USS Liberty was in fact on old WWII era freighter converted to a spy ship in the 60s.
One of those Egyptian horse freighters with US Navy id numbers painted on the hull; a massive radio mast in the middle of the ship; no cargo hatches, no derricks, communications masts, and a large dish on the aft deck? Got a picture of one of those?
The US should have bombed the Israeli Navy base as a lesson. But LBJ wasn’t on the American side.