GMDSS || Questions and Correct Detailed Answers.
Routine RT inter-ship VHF messages may be passed on... correct answers Ch.08 VHF is the only
ship-to ship message chanel listed in the options
After transmitting a VHF DSC Distress Alert in Sea Area A1, you should expect a subsequent
acknowledgement by RT on... correct answers From an MRCC and subsequently a further
acknowledgement by RT on Ch 16
An example of a Numerical ID for an AIS-SART would be... correct answers The numerical
identities are similar in format to MMSI - where those starting with a whole number from 2-7
inclusive are normal ship's MMSI
The antenna used by Inmarsat "Fleet" installation is... correct answers Inmarsat Fleet require a
directional antenna to be pointing at the satellite for the system to operate
The propagation path used by satellite EPIRB equipment is... correct answers At the frequencies
used by EPIRBs e.g. 406 MHz the main propagation path is by the direct wave or line of sight
The preferred frequency to transmit a distress message using telex in MF is... correct answers
2174.5kHz
After transmitting a VHF DSC Urgency Call, the RT call and message would normally be sent
on... correct answers The "Pan Pan" call and message would normally be sent on Ch 16, thought
repetitions , updates and long messages can be sent on a working channel
When you receive a MF DSC Urgency Call you should... correct answers MF RT Urgency Calls
and messages are normally sent on 2182kHz. However - long messages, updates and/or
repetitions may be sent on a working frequency
You receive an "All Stations" DSC Safety Call on Ch. 70 VHF, you should... correct answers
Safety "SÉCURITÉ" messages should normally be sent on a working channel - though a
, preliminary voice call may also be sent on Ch.16 (for the benefit of non- SOLAS craft not fitted
with DSC)
Your vessel has sighted a hazard to shipping in GMDSS Sea Are A1. Your initial announcement
to other vessels should be a Ch 70 DSC... correct answers An DSC all-ships Safety Call on Ch.70
will get the attention of other vessels' before your voice Securite call and message addressed to
All-Stations on Ch.16 informs them of the specific danger to navigation
After receiving a VHF DSC Distress Alert Relay from an MRCC.... correct answers You should
listen for a MAYDAY RELAY message on Ch.16
The main path of propagation for 24-hour communication on an 8 MHz radio frequency is...
correct answers 8MHz is a radio frequency in the HF band. The main path of 24hour propagation
for this band is the sky wave
The propagation path used by HF signals, from the SSB radio, to achieve long- range
communications is... correct answers The main propagation path used by HF signals to achieve
world wide communication is by reflection of sky waves
The Navtex frequency far a second language broadcast is... correct answers 490 kHz
The action to be taken after sending a false Distress Alert on VHF Ch70 is to... correct answers
To listen on Ch16 for the "Mayday" call and message
To find VHF/MF RT frequencies, and HF ITU Channels, for Coast Radio Stations providing
commercial ship-shore services, you should look in.. correct answers ALRS Vol 1 contains
details of working frequencies/ channels for CRSs providing VHF, MF and HF RT etc services -
and working channels for MRCCs.
Details of NAVTEX station locations, service area and broadcast times can be found in... correct
answers ALRS Vol. 3 is the "Maritime Safety Information" publication which includes, amongst
other services, NAVTEX. NAVTEX is also contained in ALRS Vol 5 - the GMDSS publication
Routine RT inter-ship VHF messages may be passed on... correct answers Ch.08 VHF is the only
ship-to ship message chanel listed in the options
After transmitting a VHF DSC Distress Alert in Sea Area A1, you should expect a subsequent
acknowledgement by RT on... correct answers From an MRCC and subsequently a further
acknowledgement by RT on Ch 16
An example of a Numerical ID for an AIS-SART would be... correct answers The numerical
identities are similar in format to MMSI - where those starting with a whole number from 2-7
inclusive are normal ship's MMSI
The antenna used by Inmarsat "Fleet" installation is... correct answers Inmarsat Fleet require a
directional antenna to be pointing at the satellite for the system to operate
The propagation path used by satellite EPIRB equipment is... correct answers At the frequencies
used by EPIRBs e.g. 406 MHz the main propagation path is by the direct wave or line of sight
The preferred frequency to transmit a distress message using telex in MF is... correct answers
2174.5kHz
After transmitting a VHF DSC Urgency Call, the RT call and message would normally be sent
on... correct answers The "Pan Pan" call and message would normally be sent on Ch 16, thought
repetitions , updates and long messages can be sent on a working channel
When you receive a MF DSC Urgency Call you should... correct answers MF RT Urgency Calls
and messages are normally sent on 2182kHz. However - long messages, updates and/or
repetitions may be sent on a working frequency
You receive an "All Stations" DSC Safety Call on Ch. 70 VHF, you should... correct answers
Safety "SÉCURITÉ" messages should normally be sent on a working channel - though a
, preliminary voice call may also be sent on Ch.16 (for the benefit of non- SOLAS craft not fitted
with DSC)
Your vessel has sighted a hazard to shipping in GMDSS Sea Are A1. Your initial announcement
to other vessels should be a Ch 70 DSC... correct answers An DSC all-ships Safety Call on Ch.70
will get the attention of other vessels' before your voice Securite call and message addressed to
All-Stations on Ch.16 informs them of the specific danger to navigation
After receiving a VHF DSC Distress Alert Relay from an MRCC.... correct answers You should
listen for a MAYDAY RELAY message on Ch.16
The main path of propagation for 24-hour communication on an 8 MHz radio frequency is...
correct answers 8MHz is a radio frequency in the HF band. The main path of 24hour propagation
for this band is the sky wave
The propagation path used by HF signals, from the SSB radio, to achieve long- range
communications is... correct answers The main propagation path used by HF signals to achieve
world wide communication is by reflection of sky waves
The Navtex frequency far a second language broadcast is... correct answers 490 kHz
The action to be taken after sending a false Distress Alert on VHF Ch70 is to... correct answers
To listen on Ch16 for the "Mayday" call and message
To find VHF/MF RT frequencies, and HF ITU Channels, for Coast Radio Stations providing
commercial ship-shore services, you should look in.. correct answers ALRS Vol 1 contains
details of working frequencies/ channels for CRSs providing VHF, MF and HF RT etc services -
and working channels for MRCCs.
Details of NAVTEX station locations, service area and broadcast times can be found in... correct
answers ALRS Vol. 3 is the "Maritime Safety Information" publication which includes, amongst
other services, NAVTEX. NAVTEX is also contained in ALRS Vol 5 - the GMDSS publication
