Marc

You have radar “hits” (or “blips”, or “beeps”, I suppose) and sonar “pings”. It’s from/due to the frequencies of the EM waves used when the systems first were used.

Grrrr... SHARKATTACK SEAMONSTERS TORRENTFILE SUDAN SERB/MALE GENETICS SALARYBANDS ONONE CHUNK I made this one harder than it needed to be. Most self-corrected quick on crosses and second time through.

Not overly difficult but quite fun. I was pleasanly surprised when finishing 4D (by crosses) to see the Congratulations! pop up, I thought there must be more, it hasn't been but a few minutes. Probably a better Tuesday puzzle as the hint wasn't much of a hint and the italicized clues weren't that difficult after only a few crosses.