I passed the tests on all of these.
I never used the first three.
"Chuck Charlton"
Semaphore
in semaphore.
"Chuck Charlton"
━ • ━ •    • • • •    • • ━    ━ • ━ •    ━ • ━
━ • ━ •    • • • •    • ━    • ━ •    • ━ • •    ━    ━ ━ ━    ━ •
in printed Morse Code.

"Chuck"
Aldis
in flashing light Morse code.
Click for
"Chuck Charlton"

in audio Morse code.
I used this last one only once, on a special-purpose sonar called the underwater telephone, when I was Officer of the Deck (Submerged) off Gibraltar in 1972, and the sonarman reported an unexpected submarine nearby, and I was getting no answer using voice mode, so I switched to Morse code.