Which is the correct procedure for calling a coast radio station using HF radiotelephone?

The correct procedure for calling a coast radio station using HF radiotelephone involves giving the call sign of the coast radio station three times using phonetics. This method ensures clarity and reduces the likelihood of miscommunication, especially over radio where signal quality might vary. Using phonetic spelling for each letter of the call sign allows the operator at the coast radio station to accurately identify which station is being called, thus facilitating the connection.

Phonetic alphabets, such as the NATO phonetic alphabet (e.g., Alpha, Bravo, Charlie), are universally recognized and aid in distinguishing each letter distinctly. This is particularly important in HF communications, where interference or poor transmission conditions can make it difficult to hear or understand spoken letters.

In contrast, simply stating the station name three times might not provide enough clarity because names can sound similar or may be confused with other nearby stations, especially in busy communication environments. The other options either do not follow the standard procedure for initiating a call or are less effective in ensuring the intended station is reached clearly.