At what time(s) are routine transmissions...

Question 1 / 270704W758oBJ6RLgaNWoNo2z

Question 1 of 270704W758oBJ6RLgaNWoNo2z

At what time(s) are routine transmissions forbidden in the bands of 480 to 515 kHz?

Question 1 of 27070

At what time(s) are routine transmissions forbidden in the bands of 480 to 515 kHz?

🔍 Key Concepts

• International silent periods for distress and safety traffic on MF (medium frequency) bands • The specific frequency range 500 kHz and surrounding guard band uses • Distinction between routine traffic vs. distress and safety traffic

💭 Think About

• Think about what special protection is given to the traditional 500 kHz distress frequency and nearby channels. • Ask yourself whether routine communications are always banned on this band, or only banned at certain scheduled times. • Consider how international silent periods are designed to keep a frequency clear for listening—what impact does that have on routine traffic?

✅ Before You Answer

• Verify how the international silent period is defined in relation to 500 kHz and the 480–515 kHz band. • Check whether the band 480–515 kHz is part of the maritime MF distress and calling band or if it lies outside the marine bands. • Confirm if routine transmissions are restricted only during silent periods or at all times on these frequencies.

Question 1 of 27070

At what time(s) are routine transmissions forbidden in the bands of 480 to 515 kHz?

Routine transmissions are forbidden in 480 to 515 kHz

480 to 515 kHz are out of the marine radio band

Routine transmissions are forbidden during the international silent period

None of the above

Question 1 / 270704W758oBJ6RLgaNWoNo2z

Question 1 of 270704W758oBJ6RLgaNWoNo2z

At what time(s) are routine transmissions forbidden in the bands of 480 to 515 kHz?

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Question 1 of 27070

At what time(s) are routine transmissions forbidden in the bands of 480 to 515 kHz?