0:01
Morse code letter "u", amateur ham radio
0:01
Radio with weak signal, morse code letter "e", military
0:01
Morse code number zero, military
0:03
Radio with a weak signal, morse code emergency SOS, twice, military
0:03
Morse code number 6, amateur ham radio
0:01
Morse code: letter a
0:01
Morse code: letter k
0:01
Radio with a weak signal, morse code number three, military
0:01
Morse code: number one
0:01
Morse code: l
0:01
Morse code: number seven
0:01
Morse code: letter u
0:01
Ship, morse code spotlight, exterior, open and close gates, WWII merchant marine
0:01
Radio with a weak signal, morse code letter "y", military
0:01
Morse code: number five
0:01
Morse code: number nine
0:01
Morse code: number eight
0:01
Morse code: number three
0:01
Radio with a weak signal, morse code letter "o", military
0:01
Morse code: number six