GMDSS GOC HF Distress Frequency Flashcards
24 English flashcards for GMDSS GOC revision. Match the five HF distress DSC and voice pairs and catch mistakes in paper readouts.
About this deck
Practise the five HF distress frequency pairs used in GMDSS, the Global Maritime Distress and Safety System. Each pair links a digital selective calling (DSC) frequency to a radiotelephony (voice) frequency in the same band. The deck is for trainees revising for the General Operator’s Certificate (GOC) on paper or with simulated readouts.
Start by recalling both frequencies for HF4, HF6, HF8, HF12 and HF16. Then match DSC to voice and voice to DSC. The final cards ask you to read a band label, spot a mix-up between bands or modes, or check a decimal or unit. Related questions are spaced through the deck. Other bands, band selection and radio procedures are outside the scope of these frequency-matching exercises.
The frequency pairs were checked against the IMO distress frequency table and ITU Radio Regulations, Appendix 15. The questions were written independently with AI assistance, and the cover is an original AI-generated illustration. No examination questions, mark schemes or curriculum text were copied. CC0 applies to original material and generated media to the extent applicable rights exist.
Independent, unofficial study material by Open Study Contributor. See the official CEPT GOC syllabus for the broader exam scope. For certification requirements, consult the relevant national authority.
Cards in this deck
Card 1
Question
What are the DSC and voice distress frequencies for HF8?
Answer
DSC 8414.5 kHz · voice 8291 kHz.
Card 2
Question
What are the DSC and voice distress frequencies for HF4?
Answer
DSC 4207.5 kHz · voice 4125 kHz.
Card 3
Question
What are the DSC and voice distress frequencies for HF12?
Answer
DSC 12577 kHz · voice 12290 kHz.
Card 4
Question
What are the DSC and voice distress frequencies for HF6?
Answer
DSC 6312 kHz · voice 6215 kHz.
Card 5
Question
What are the DSC and voice distress frequencies for HF16?
Answer
DSC 16804.5 kHz · voice 16420 kHz.
Card 6
Question
Which HF distress DSC frequency pairs with voice 4125 kHz?
Answer
4207.5 kHz (HF4).
Card 7
Question
Which HF distress voice frequency pairs with DSC 8414.5 kHz?
Answer
8291 kHz (HF8).
Card 8
Question
Which HF distress DSC frequency pairs with voice 6215 kHz?
Answer
6312 kHz (HF6).
Card 9
Question
Which HF distress voice frequency pairs with DSC 12577 kHz?
Answer
12290 kHz (HF12).
Card 10
Question
Which HF distress voice frequency pairs with DSC 16804.5 kHz?
Answer
16420 kHz (HF16).
Card 11
Question
Which HF distress DSC frequency pairs with voice 8291 kHz?
Answer
8414.5 kHz (HF8).
Card 12
Question
Which HF distress voice frequency pairs with DSC 4207.5 kHz?
Answer
4125 kHz (HF4).
Card 13
Question
Which HF distress DSC frequency pairs with voice 12290 kHz?
Answer
12577 kHz (HF12).
Card 14
Question
Which HF distress voice frequency pairs with DSC 6312 kHz?
Answer
6215 kHz (HF6).
Card 15
Question
Which HF distress DSC frequency pairs with voice 16420 kHz?
Answer
16804.5 kHz (HF16).
Card 16
Question
A paper HF8 distress row shows DSC 8291 kHz and voice 8414.5 kHz. What is the error?
Answer
The labels are swapped. DSC is 8414.5 kHz and voice is 8291 kHz.
Card 17
Question
A paper HF4 distress row shows 4207.5 kHz in both columns. Which column is wrong, and what belongs there?
Answer
The voice column should show 4125 kHz. The DSC entry is correct.
Card 18
Question
An HF12 distress training readout shows DSC 12577.0 kHz and voice 12290.0 kHz. Do both frequencies match the HF12 distress pair?
Answer
Yes. DSC is 12577 kHz and voice is 12290 kHz. The trailing zeros leave the frequencies unchanged.
Card 19
Question
An HF6 distress training readout lists DSC 6.312 MHz. What is that entry in kHz?
Answer
6312 kHz. One MHz equals 1000 kHz.
Card 20
Question
A paper HF16 distress row shows DSC 16804.0 kHz and voice 16420 kHz. Which entry needs a correction?
Answer
The DSC entry should be 16804.5 kHz. The voice entry is correct.
Card 21
Question
A training readout pairs DSC 8414.5 kHz with voice 4125 kHz. Do the two HF distress entries belong to the same band?
Answer
No. DSC 8414.5 kHz belongs to HF8 and voice 4125 kHz belongs to HF4.
Card 22
Question
A paper HF12 distress log marks 12290 kHz as DSC. Which mode label belongs on that entry?
Answer
Radiotelephony (voice).
Card 23
Question
An HF6 paper distress worksheet lists voice 6215 kHz. A second readout lists that field as 6.125 MHz. Do the displays agree?
Answer
No. 6215 kHz equals 6.215 MHz.
Card 24
Question
A distress worksheet row lists DSC 16804.5 kHz and voice 16420 kHz with the band label blank. Which HF band label fits?
Answer
HF16 (the 16 MHz band).
24 cards
GMDSS GOC HF Distress Frequency Flashcards
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