How are high seas (HF) radiotelephone...

Question 1 / 20rAyWbGNXPuaL5BlHpW37

Question 1 of 20rAyWbGNXPuaL5BlHpW37

How are high seas (HF) radiotelephone communications initially established between a vessel and a public correspondence station?

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Question 1 of 20

rAyWbGNXPuaL5BlHpW37

How are high seas (HF) radiotelephone communications initially established between a vessel and a public correspondence station?

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🔍 Key Concepts

• HF (high frequency) radiotelephone procedures vs. VHF procedures • Role of public correspondence (coast) stations and which bands/modes they typically use • Difference between radiotelephone voice and NBDP/SITOR (narrow-band direct printing) calling procedures

💭 Think About

• Ask yourself: on the high seas HF voice circuits, how does a ship normally get the attention of a coast station before passing traffic? • Consider which calling frequency or channel the vessel would use first: is it a distress/calling channel, a data-printing channel, or a known monitored working channel? • Think about whether public correspondence stations are limited to data modes only or if they also use voice (radiotelephone) for routine traffic.

✅ Before You Answer

• Verify which method is used to initiate HF voice contact: is it via radiotelephone or NBDP/SITOR printing? • Check whether VHF Channel 16 is appropriate for a question that clearly specifies high seas (HF) communications. • Confirm whether public correspondence stations are allowed/required to operate only SITOR (NBDP) or if they can also handle radiotelephone voice traffic.

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Question 1 of 20

How are high seas (HF) radiotelephone communications initially established between a vessel and a public correspondence station?

The vessel listens for "free signals" and calls the public correspondence station on the SITOR (NBDP) calling channel with the strongest marker signal.

The vessel calls and establishes voice contact with the public correspondence station on a channel that the station is known to monitor , and the two stations then proceed with their business .

The vessel calls the public correspondence station on VHF Channel 16, and the two stations then switch to the working channel.

Public Correspondence Stations operate SITOR (NBDP) only.

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Question 1 / 20rAyWbGNXPuaL5BlHpW37

Question 1 of 20rAyWbGNXPuaL5BlHpW37

How are high seas (HF) radiotelephone communications initially established between a vessel and a public correspondence station?

Back

Question 1 of 20

rAyWbGNXPuaL5BlHpW37

How are high seas (HF) radiotelephone communications initially established between a vessel and a public correspondence station?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

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