What is the reason for the USA-INT control...

What is the reason for the USA-INT control...

Question 1 of 270706hWOLWA2KkVfCotr4UKw

What is the reason for the USA-INT control or function?

Question 1 of 27070

Q

What is the reason for the USA-INT control or function?

🔍 Key Concepts

• Simplex vs duplex VHF channels (one frequency vs separate transmit/receive) • Difference between U.S. (USA) and International (INT) marine VHF channel plans • Purpose of the USA/INT switch on a VHF set (frequency assignments, not power/range)

💭 Think About

• Think about what has to change in the radio so a U.S. boat can talk properly with a foreign-flag vessel or foreign coast station on the "same" channel number. • Ask yourself: are the differences between USA and INT channel sets mainly about power/range, or about how certain channels are assigned (ship-to-ship vs ship-to-shore)? • On some numbered channels, does the U.S. use them ship-to-ship (simplex) while internationally they are used ship-to-shore (duplex), or is it the other way around?

✅ Before You Answer

• Confirm that USA/INT does NOT change transmitter power or physical range of the set. • Review which system (USA or INT) uses more duplex (ship/shore) public correspondence channels. • Verify which direction the conversion usually goes on shared channel numbers: from INT duplex use to USA simplex use, or the reverse.