USS Liberty — Israeli scienter.

I've read a lot about the attack on the Liberty but I don't recall reading this particular detail about the Israeli jamming of the Liberty's communications:

One of the most remarkable aspects of the Israelis "error" [in attacking the USS Liberty] is that they jammed US Navy communications frequencies, then claimed they thought they were attacking an Egyptian ship.

The obvious point is that if you think you are attacking an Egyptian ship, you jam Egyptian frequencies. The Israelis would have known which naval forces operating in the Mediterranean were operating on which frequencies. Their choice of the US frequencies was thus deliberate.

The second point is that there was no need to jam the communications of an Egyptian ship. The Egyptian Air Force had been destroyed on the ground and there was thus no need to keep an Egyptian ship from communicating to its headquarters that it was under attack. There was no possibility of Egyptian air support materializing anywhere.

The Israelis were also attacking everything Egyptian and couldn't have cared less that one minor target would report an Israeli attack. Anything that increased Egyptian panic or confusion, or that diverted Egyptian attention, would have been to Israel's advantage.

Even if it's Israeli Air Force SOP to jam communications of its targets, there's still point one above. They chose American frequencies, not Egyptian ones, and it beggars the imagination that they made "a mistake" about which number(s) to dial into their jammers.

"The Violation of the Liberty." By Richard K. Smith, Naval Institute Proceedings, June 1978, republished at USS Liberty.