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OOW Oral Study > GMDSS > Flashcards

GMDSS Flashcards

1
Q

What would your daily equipment tests be? (4 factors)

A
  1. Internal Self-test of DSC controller a VHF DSC Test Call
  2. Diagnostic Test of SAT-C (Distress test on the simulator)
  3. All printers have paper
  4. Main radio batteries (Isolate them properly if you need to test/change a fuse)
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2
Q

What would your weekly equipment tests be? (2 factors)

A
  1. DSC equipment using a live call to an MRCC or Shore Station
  2. Reserve energy supply (generator) (if it is not another battery)
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3
Q

What would your monthly equipment tests be? (5 factors)

A
  1. HH VHF Test (on Ch15 or Ch17)
  2. EPIRBS & SARTS (visual, battery, test button, terminals)
  3. Performance Verification (PV) Test on SAT-C
  4. All other batteries (including the HH VHF radio)
  5. Antennae / Aerials (Clean, check all wires & fittings for signs of damage and tear).
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4
Q

What is Admiralty List of Radio Signals vol.2?

A

Radio Navigation Aids & Radio Time Signals

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5
Q

What is Admiralty List of Radio Signals vol.1?

A

Coast Radio Stations

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6
Q

What is Admiralty List of Radio Signals vol.3?

A

Radio Weather Services and Nav Warnings

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7
Q

What is Admiralty List of Radio Signals vol.4?

A

List of Meteorological Observations stations

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8
Q

What is Admiralty List of Radio Signals vol.5?

A

Global Maritime Distress and Safety Systems

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9
Q

What is Admiralty List of Radio Signals vol.6?

A

Pilot Services and Port Operations including VTS

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10
Q

How does an EPIRB work?

A

EPIRB when activated or in contact with saltwater will send a signal (406 mHz) containing position & HEX ID (Vessel information) to a satellite. The satellite will then send that information to the LES (Land Earth Station) which the EPIRB is registered to. The MRCC in question will then contact appropriate authorities/MRCC in the area affected.

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11
Q

Where can you use an EPIRB?

A

Everywhere, global coverage

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12
Q

What is the service interval, inspection interval and battery life for an EPIRB?

A

5 years service life. Monthly inspection. 48h battery life in transmission mode

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13
Q

What is HEX ID?

A

Unique ID for each EPIRB containing vessel specifics and DPA.

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14
Q

What do you do if you accidentally activate an EPIRB?

A

Switch it off & call the MRCC

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15
Q

What does EPIRB stand for?

A

Emergency position indicating radio beacon

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16
Q

What does SART stand for?

A

Search- and rescue transponder

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17
Q

Where should you place a SART?

A

As high as possible, works with ground waves

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18
Q

How does a SART work?

A

Responds with a signal when interrogated by a 9gHz X-BAND Radar beam

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19
Q

What is the service interval, inspection interval and battery life for a SART?

A

5 years service life, monthly inspection, 96h battery life in Rx (stand-by mode) 8h in Tx (Transmission mode)

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20
Q

What does an AIS SARTs MMSI start with?

A

970

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21
Q

What is the SARTs range?

A

Approximately 5nm for a scanner 15m height, approximately 40nm by helicopter

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22
Q

How do you know a SART is transmitting?

A

Flashing LED and audio alert

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23
Q

Can a Radar/AIS SART be incorporated in an EPIRB?

A

Yes

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24
Q

What is A1?

A

An area with guaranteed VHF DSC communications with MRCCs

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25
Q

What is A2?

A

Excluding A1, an area with MF range with MRCCs

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26
Q

What is A3?

A

Excluding A1 & A2, an area with INMARSAT satellite coverage with MRCCs (up to approx 76°N and 76°S)

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27
Q

What is A4?

A

Excluding A1, A2, A3, an area within HF DSC range of MRCCs (Polar regions, above 76°N and 76°S)

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28
Q

What are the Equipment requirements for A1? (5 factors)

A
  1. VHF DSC Radio
  2. Handheld VHF
  3. EPIRB
  4. SART
  5. NAVTEX
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29
Q

What are the Documentations requirements for A1? (4 factors)

A
  1. Ship’s radio license
  2. Shore based maintenance agreement
  3. Log book
  4. GOC’s (personal licenses)
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30
Q

Where would you send a distress alert in A1?

A

Use VHF Ch 70 and/or an EPIRB

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31
Q

Where would you send a distress alert in A2?

A

Same as A1 plus MF 2187.5KHz

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32
Q

Where would you send a distress alert in A3?

A

Same as A1 & A2 plus HF 8414.5KHz / Satellite

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33
Q

Where would you send a distress alert in A4?

A

Same as A1, A2, A3 plus Paired 12/16 MHz

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34
Q

What are the Equipment requirements for A2?

A

Same as A1, plus MF with R/T & DSC and EGC receiver

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35
Q

What are the Equipment requirements for A3?

A

Same as A1 & A2, plus INMARSAT, 2nd VHF DSC

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36
Q

What are the Equipment requirements for A4?

A

Same as A1,A2,A3, plus HF with R/T & DSC & Telex, 2nd HF

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37
Q

Which channel is for distress & urgency?

A

Ch 16

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38
Q

Which channels is for onboard communications?

A

Ch 15, 17

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39
Q

Which channel is for bridge to bridge for safe navigation?

A

Ch 13

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40
Q

Which channel is for Direct selective calling?

A

Ch 70

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41
Q

Which channel is for Small ship’s safety?

A

Ch 67

42
Q

Which channels is for UK Marinas?

A

Ch 80

43
Q

Where do you find the right channel for port operations / pilots?

A

Admiralty List of Radio Signals Vol.6

44
Q

Which channels are for ship to ship? (Inter-ship)

A

Ch 6, 8, 72, 77

45
Q

What VHF channel and which frequencies for DSC? (Distress)

A

Ch 70
2187.5 kHz - MF
8414.5 kHz - HF
Paired 12 MHz
Paired 16 MHz

46
Q

What VHF channel and which frequencies for R/T? (Distress)

A

Ch 16
2182 kHz - MF
8291 kHz - HF
Paired 12 MHz
Paired 16 MHz

47
Q

Which frequency for TELEX? (Distress)

A

2174.5 kHZ - MF

48
Q

What does Satellite short code 32 mean?

A

Medical advice

49
Q

What does Satellite short code 38 mean?

A

Medical assistance

50
Q

What does Satellite short code 39 mean?

A

Maritime assistance (For SOPEP etc)

51
Q

What does Satellite short code 41 mean?

A

Weather oberservations

52
Q

What does Satellite short code 42 mean?

A

Navigational warning

53
Q

What does Satellite short code 43 mean?

A

AMVER or Ships position report

54
Q

Frequency for Ship to Shore DSC routine calls?

A

2189.5 kHz

55
Q

Frequency for Shore to Ship DSC routine calls?

A

2177 kHz

56
Q

Frequency for Inter-ship DSC calls? MF

A

2177 kHz

57
Q

Frequency for Ship to Ship/Shore routine working R/T simplex frequency?

A

2048 kHz

58
Q

Frequency for SART?

A

9-10 GHz

59
Q

Frequency for alerting EPIRB?

A

406 MHz

60
Q

What is the first three digits for SAR aircraft? MMSI

A

111

61
Q

What is the first three digits for AIS SART? MMSI

A

970

62
Q

What is the first digits for a Coast station / MRCC? MMSI

A

00

63
Q

What is the frequency for NAVTEX (local language broadcasts)?

A

490 KHz

64
Q

What is the frequency for NAVTEX (English broadcasts)?

A

518 KHz

65
Q

What is the frequency for NAVTEX (Tropical areas)?

A

4209.5 KHz

66
Q

What is the frequency for INMARSAT & EGC SafetyNet?

A

1.5/1.6 GHz

67
Q

Between which frequencies are VHF channels? (for maritime use)

A

156.00 - 174.00MHz

68
Q

How much KHz between each VHF channel?

A

25KHz

69
Q

What are the first digits for UK? MMSI

A

232

70
Q

What is the first digit for a group call? MMSI

A

0

71
Q

What is your Audio frequency band?

A

300-2700KHz

72
Q

What is the Low frequency band?

A

100-400KHz

73
Q

What is the Medium wave AM band?

A

500-1600KHz

74
Q

What is the Marine MF Band?

A

1.6-3MHz

75
Q

What is the HF Band?

A

8-17MHz

76
Q

What is the VHF Band?

A

88-108MHz

77
Q

What is the Marine VHF Band?

A

156-174MHz

78
Q

What is DC?

A

0Hz

79
Q

What is AC?

A

50Hz

80
Q

What is the end of the Audio frequency Band?

A

19KHz

81
Q

What number does your Sat-C Id start with?

A

4

82
Q

How do you end a Sat-C message?

A

nnnn

83
Q

What is Dual Watch?

A

Monitoring working channel and Ch 16 simultaneously. Ch 16 takes priority if VHF can not handle Dual watch.

84
Q

What is a Simplex channel?

A

One aerial, one frequency. Found in nearly all leisure and small workboats. Transmission is one way at a time, i.e TALK or LISTEN not both

85
Q

What is a Duplex channel?

A

Two aerials and two frequencies needed. Transmissions and reception take place simultaneously Used for shore-shore or ship- shore (never ship-ship)

86
Q

What is the range of VHF?

A

Approximately 35NM

87
Q

What is the biggest determining factor of VHF range?

A

Height of aerial

88
Q

What wave is VHF?

A

Direct Wave (Line of sight)

89
Q

What wave is MF?

A

Ground Wave (through earth)

90
Q

What wave is HF?

A

Sky wave (Bouncing of Ionosphere)

91
Q

What is radio propagation?

A

Radio waves range affected by refraction
1. Normal refraction
2. Super-refraction
3. Sub-refraction
4. Ducting

92
Q

What is Capture effect?

A

The full suppression of the weaker signal at the receiver’s limiter (if one exists), where the weaker signal is muted rather than amplified

93
Q

What is the maximum permitted power for VHF, MF & HF?

A

VHF - 25 watts
MF - 400 watts
HF - 1500 watts (1.5 kW)

94
Q

What does ITU stand for?

A

International Telecommunications Union

95
Q

What SOLAS chapter is Radio Communications?

A

SOLAS IV (4) - Radio communications

96
Q

Which ships need to comply with SOLAS requirements for GMDSS? (2 factors)

A
  1. Vessels over 300 GT on international voyages or in the open sea
  2. Passenger vessels carrying more than 12 passengers on international voyages or in the open sea
97
Q

What should GMDSS ships be capable of?

A
  1. Transmit ship to shore distress alerts by at least 2 independent means
  2. Receive shore to ship distress alerts
  3. Transmit and receive ship to ship distress alerts
  4. Transmit and receive SAR co-ordinating communications
  5. Transmit and receive on-scene communications
  6. Transmit and receive (homing) signals for location finding
  7. Receiving maritime safety information
  8. Transmitting and receiving general radio-communications relating to the management of the vessel
  9. Transmitting and receiving bridge to bridge communications
98
Q

What is the order of information of a shipping forecast?

A
  1. Gale
  2. Wind
  3. Sea state
  4. Weather
  5. Visibility
99
Q

Which NAVTEX information can we not de-select?

A

ABDL
A - Nav Warnings
B - Met Warnings
D - SAR Information
L - Additional Nav Warnings

100
Q

What is a NAVTEX?

A

NAVTEX is an international automated direct-printing service for promulgation of maritime safety information (MSI), navigational and meteorological warnings, meteorological forecasts and other urgent safety-related messages to ships.

101
Q

What is an HRU?

A

Hydrostatic release unit
Weak link
Strong rope
1.5m-4m Depth

102
Q

Means of signalling for distress? 15p (Annex 4 msn 1781)

A
  1. Gun or other explosive signal fired at intervals of about a minute;
  2. Continuous sounding with any fog-signalling apparatus
  3. Any SOS in morse code
  4. DSC
  5. R/T - Mayday
  6. November - Charlie
  7. Square flag with a ball above or below
  8. Flames on the vessel
  9. Red light from a flare
  10. Orange smoke
  11. Slowly and repeatedly raising and lowering arms outstretched to each side;
  12. EPIRB
  13. SART
  14. SAT-C

OOW Oral Study (34 decks)

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