Subelement C: Equipment Operations— Topic 15: MF-HF Equipment Controls
Question 1-15C3
Element 1 (MROP)To set-up the MF/HF transceiver for a voice call to a coast station, the operator must:
Explanation
For a voice call on MF/HF frequencies, the internationally recognized and standard mode is J3E. J3E is the ITU emission designator for single-sideband, suppressed carrier telephony (voice). This mode is highly efficient for long-distance voice communication on these bands due to its narrow bandwidth and power efficiency compared to older AM modes.
Options A, B, and D are incorrect because F1B and J2B are emission designators for digital modes like RTTY, SITOR, or other data transmissions, not voice. SITOR, FEC, and ARQ are error-correction and data transfer protocols used with digital modes, not for basic voice communication. Therefore, selecting J3E ensures proper voice operations for your call.
Related Questions
1-15C1 Which modes could be selected to receive vessel traffic lists from high seas shore stations?1-15C2 Why must all MF-HF Distress, Urgency and Safety communications take place solely on the 6 assigned frequencies and in the simplex operating mode?1-15C4 MF/HF transceiver power levels should be set:1-15C5 To set-up the MF/HF transceiver for a TELEX call to a coast station, the operator must:1-15C6 What is the purpose of the Receiver Incremental Tuning (RIT) or “Clarifier” control?