What letter is . . . in morse code?
If you was unable to signal by sound, what else could you use?
In what year was the Morse code first developed?
What letter is _ in morse code?
What letter is _ . . _ in morse code?
Samuel ____ and Alfred Vail invented the Morse Code.
If you needed to send an SOS, which from the below would you communicate?
What would you use to communicate the letter A?