With what type(s) of emission and upon what...

Question 1 / 27070D7gMXbDqBgD7A77FU51j

Question 1 of 27070D7gMXbDqBgD7A77FU51j

With what type(s) of emission and upon what frequency should a transmitter be adjusted to transmit a distress call?

Question 1 of 27070

With what type(s) of emission and upon what frequency should a transmitter be adjusted to transmit a distress call?

🔍 Key Concepts

• International distress frequencies used in radiotelegraphy (older MF systems) • Meaning of "type A-2" and "type B" emissions in radio communications • Historical use of 500 kHz vs. 600 kHz vs. 400 kHz for distress

💭 Think About

• Which medium-frequency (MF) wavelength (in kHz) was internationally recognized for distress in Morse/radiotelegraphy? • Among the listed emission types (A-2, B, C), which were permitted for distress signaling on that frequency? • Do all three elements in one choice (frequency, "international" status, and emission type) match standard practice, or is something slightly off in each wrong option?

✅ Before You Answer

• Verify which single MF frequency was designated as the international radiotelegraph distress frequency (in kHz). • Check which emission designators (A-2 vs. B vs. C) were authorized on that distress frequency. • Confirm whether any option that mentions 600 kHz or 400 kHz matches known distress allocations, or if only one frequency was internationally standardized for distress.

Question 1 of 27070

With what type(s) of emission and upon what frequency should a transmitter be adjusted to transmit a distress call?

The distress wave of 600 kHz and type C emission

The distress wave of 400 kHz and type C emission

The international distress wave of 500 kHz / type A-2 OR B emission

None of the above

Question 1 / 27070D7gMXbDqBgD7A77FU51j

Question 1 of 27070D7gMXbDqBgD7A77FU51j

With what type(s) of emission and upon what frequency should a transmitter be adjusted to transmit a distress call?

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Question 1 of 27070

With what type(s) of emission and upon what frequency should a transmitter be adjusted to transmit a distress call?