Subelement C: Equipment Operations— Topic 16: MF-HF Frequency & Emission Selection
Question 1-16C2
Element 1 (MROP)What is the MF radiotelephony calling and Distress frequency?
Explanation
The international radiotelephony calling and distress frequency in the Medium Frequency (MF) band is 2182 kHz. This frequency is a critical component of the Global Maritime Distress and Safety System (GMDSS) for voice communications, used by ships and coast stations to initiate distress alerts and establish initial contact.
* **C) 2182 kHz:** This is the correct, internationally recognized MF radiotelephony distress and calling frequency.
* **A) 2670 kHz:** While an MF frequency used in maritime radio, it is typically a working frequency for general ship-to-shore or intership communication, not the primary distress channel.
* **B) Ch-06 VHF:** VHF Channel 06 is an intership working frequency, not an MF frequency, and not the primary VHF distress channel (which is Ch-16).
* **D) Ch-22 VHF:** VHF Channel 22 is a U.S. Coast Guard liaison channel, not an MF frequency, and not the primary distress channel.
Related Questions
1-15C6 What is the purpose of the Receiver Incremental Tuning (RIT) or “Clarifier” control?1-16C1 On what frequency would a vessel normally call another ship station when using a radiotelephony emission?1-16C3 For general communications purposes, paired frequencies are:1-16C4 What emission must be used when operating on the MF distress and calling voice frequency?1-16C5 Which of the following defines high frequency “ITU Channel 1212”?