1348 Ladies and Gentlemen Our Fearless Leader Just Morse Coded Q (youtu.be) posted 3 years ago by Natethegreat 3 years ago by Natethegreat +1350 / -2 472 comments share 472 comments share save hide report block hide replies
You can do it with almost anything. POWs have used blinking, stranded people have used mirrors reflecting light. You can use sound (obviously). It's super versatile.