Earlier quoted context omitted.
> There is no word in English dictionary with HH (°°°° °°°°). Beachhead
More commonly, "uhh", "ahh", and "ehh" (and their elongations) -- though I imagine their function is either fulfilled in other ways in Morse (prosigns?) or simply not needed.
'Ahh uhh' etc aren't useful in a mode of telegraph communication which is rather very terse & commonly does not even include is/are/and etc in transmission. Pithy sentences relaying the content matter is encouraged - to speed up typing & also not to block useful airwave. Most HAMs are sharing a narrow set of channels & only one operator pushes-to-'talk' at any given time