Question 67 RVR03 - Mate of LT 500-1600 GRT

The Correct Answer is D **Explanation for Option D (2182 kHz):** 2182 kHz is the internationally recognized, globally mandated primary calling and distress frequency for voice communication on the high-frequency (HF)/medium-frequency (MF) marine radiotelephone band (Single Side Band, or SSB). All vessels equipped with MF/HF SSB radio systems are required to continuously monitor this frequency when not actively transmitting on another frequency. This frequency is reserved exclusively for distress, urgency, safety, and initial calling between ships or between ships and shore stations. **Explanation for Incorrect Options:** * **A) 1492 kHz:** This frequency is not designated as a primary international marine distress or calling frequency. It falls within the medium frequency (MF) range but does not hold the specific, legally mandated status of 2182 kHz. * **B) 1892 kHz:** Similar to 1492 kHz, 1892 kHz is within the general MF band but is not the specific, designated global distress and safety calling frequency. * **C) 2082 kHz:** While close in numerical value to the correct answer, 2082 kHz is not the officially designated international marine distress frequency (which is 2182 kHz). Minor differences in frequency can be critical in radio communications standards.