Open-Channel communication must use the standard terms and protocols in this rule
and must be acknowledged promptly.
WARNING
Competent Workers must not assume that a receiver has understood a
message before the receiver confirms that the message has been
understood.
If the meaning of a spoken communication is not understood:
the receiver must ask that it be repeated;
if necessary, the sender and receiver must use the Phonetic Alphabet and spoken
numbers to clarify and confirm the message; or
arrange alternative means to communicate with the sender.