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.
Mayelana naleli qoqo
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.
Amakhadi akuleli qoqo
Ikhadi 1
Umbuzo
What are the DSC and voice distress frequencies for HF8?
Impendulo
DSC 8414.5 kHz · voice 8291 kHz.
Ikhadi 2
Umbuzo
What are the DSC and voice distress frequencies for HF4?
Impendulo
DSC 4207.5 kHz · voice 4125 kHz.
Ikhadi 3
Umbuzo
What are the DSC and voice distress frequencies for HF12?
Impendulo
DSC 12577 kHz · voice 12290 kHz.
Ikhadi 4
Umbuzo
What are the DSC and voice distress frequencies for HF6?
Impendulo
DSC 6312 kHz · voice 6215 kHz.
Ikhadi 5
Umbuzo
What are the DSC and voice distress frequencies for HF16?
Impendulo
DSC 16804.5 kHz · voice 16420 kHz.
Ikhadi 6
Umbuzo
Which HF distress DSC frequency pairs with voice 4125 kHz?
Impendulo
4207.5 kHz (HF4).
Ikhadi 7
Umbuzo
Which HF distress voice frequency pairs with DSC 8414.5 kHz?
Impendulo
8291 kHz (HF8).
Ikhadi 8
Umbuzo
Which HF distress DSC frequency pairs with voice 6215 kHz?
Impendulo
6312 kHz (HF6).
Ikhadi 9
Umbuzo
Which HF distress voice frequency pairs with DSC 12577 kHz?
Impendulo
12290 kHz (HF12).
Ikhadi 10
Umbuzo
Which HF distress voice frequency pairs with DSC 16804.5 kHz?
Impendulo
16420 kHz (HF16).
Ikhadi 11
Umbuzo
Which HF distress DSC frequency pairs with voice 8291 kHz?
Impendulo
8414.5 kHz (HF8).
Ikhadi 12
Umbuzo
Which HF distress voice frequency pairs with DSC 4207.5 kHz?
Impendulo
4125 kHz (HF4).
Ikhadi 13
Umbuzo
Which HF distress DSC frequency pairs with voice 12290 kHz?
Impendulo
12577 kHz (HF12).
Ikhadi 14
Umbuzo
Which HF distress voice frequency pairs with DSC 6312 kHz?
Impendulo
6215 kHz (HF6).
Ikhadi 15
Umbuzo
Which HF distress DSC frequency pairs with voice 16420 kHz?
Impendulo
16804.5 kHz (HF16).
Ikhadi 16
Umbuzo
A paper HF8 distress row shows DSC 8291 kHz and voice 8414.5 kHz. What is the error?
Impendulo
The labels are swapped. DSC is 8414.5 kHz and voice is 8291 kHz.
Ikhadi 17
Umbuzo
A paper HF4 distress row shows 4207.5 kHz in both columns. Which column is wrong, and what belongs there?
Impendulo
The voice column should show 4125 kHz. The DSC entry is correct.
Ikhadi 18
Umbuzo
An HF12 distress training readout shows DSC 12577.0 kHz and voice 12290.0 kHz. Do both frequencies match the HF12 distress pair?
Impendulo
Yes. DSC is 12577 kHz and voice is 12290 kHz. The trailing zeros leave the frequencies unchanged.
Ikhadi 19
Umbuzo
An HF6 distress training readout lists DSC 6.312 MHz. What is that entry in kHz?
Impendulo
6312 kHz. One MHz equals 1000 kHz.
Ikhadi 20
Umbuzo
A paper HF16 distress row shows DSC 16804.0 kHz and voice 16420 kHz. Which entry needs a correction?
Impendulo
The DSC entry should be 16804.5 kHz. The voice entry is correct.
Ikhadi 21
Umbuzo
A training readout pairs DSC 8414.5 kHz with voice 4125 kHz. Do the two HF distress entries belong to the same band?
Impendulo
No. DSC 8414.5 kHz belongs to HF8 and voice 4125 kHz belongs to HF4.
Ikhadi 22
Umbuzo
A paper HF12 distress log marks 12290 kHz as DSC. Which mode label belongs on that entry?
Impendulo
Radiotelephony (voice).
Ikhadi 23
Umbuzo
An HF6 paper distress worksheet lists voice 6215 kHz. A second readout lists that field as 6.125 MHz. Do the displays agree?
Impendulo
No. 6215 kHz equals 6.215 MHz.
Ikhadi 24
Umbuzo
A distress worksheet row lists DSC 16804.5 kHz and voice 16420 kHz with the band label blank. Which HF band label fits?
Impendulo
HF16 (the 16 MHz band).
amakhadi angu-24
GMDSS GOC HF Distress Frequency Flashcards
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