Aside from FT-8 and related digital modes it has an impressive ability to punch though when few other modes will.
The charts, for example, lists the morse code for the VOR, which translates to FCM
Last weekend when we talked he mentioned being sad that a lot of this knowledge is getting lost. Must be a strange feeling walking through a museum and it being the tools of your trade.
Edit: You'll have to navigate to the Morse Trainer link from the main page.
Also, it's the best because it has knobs for all the variables -- speed, number of characters sent, even options to add QRM (interference) and variable sending speed (imitating very well someone with an unsteady fist).
As an aside, it's pointless to learn code visually. It's only really useable as an auditory messaging system.
What? When I was a kid, it was common for camping flashlights to have pressure buttons on the side, which was intended for (and we used for) morse code. Ships used bright, shuttered lights for Morse code, soldiers used it, scouts used it, kids communicated with friends in the neighborhood at night.
Plus, I am willing to bet that far more messages using Morse are sent over radio than with lights.
Note that visual learning is not recommended for the simple reason that you want to have Morse ingrained and recognized automatically when listening, not translate it consciously. It's like learning any other system of symbols for active use: you want to know at once what you're hearing or seeing, not leaf through cheatsheets, even if they're in your brain.
One really surprising thing was how little morse code was to be found. And when I did find it, the decoders (like fldigi) were unreliable in decoding. I'm not sure if it was because of their decoding algorithms or if the senders simply had too much variance in their timing.
The bit of traffic I did decode was simply exchanges of contact so each could log a new call sign in their books. I'm not sure what I was expecting to find: because the bits seemed to be "secret" due to my ignorance of morse code, my brain heuristically assumed information they hid must be important.
I still find it intriguing because it's such a simple way of communicating. You can build the circuits yourself and with a license communicate with others over kilometers (with a good antenna sometimes thousands of kilometers). Think about it, without cell phone towers, satellites and all that commercial infrastructure it's really the only way to reach anyone.
It's, imo, one of the earliest technologies that shows the divergence between what is easy for humans vs what is easy for machines.
You have 3 signals: dots, dashes, and spaces.
Here's the relevant extract from the wikipedia article on Morse Code:
> Each Morse code symbol is formed by a sequence of dots and dashes. The dot duration is the basic unit of time measurement in Morse code transmission. The duration of a dash is three times the duration of a dot. Each dot or dash within a character is followed by period of signal absence, called a space, equal to the dot duration. The letters of a word are separated by a space of duration equal to three dots, and the words are separated by a space equal to seven dots
R is: .-. (dit dah dit)
which could be 121 in ternary (0 being pause)
or 1011101 in binary, since one dah is three dits long
Today, except SOS, I can't read/write anything in morse.