CD.21 GMDSS

1. What does GMDSS stand for?

1. Global Maritime Distress and Safety System.

2. Which operator's certificate gives you the authority to sail on any GMDSS ship in all sea areas?

1. GOC

3. One of the most important advantages with GMDSS is that…

1. a ship in distress shall always be able to send a ship-to-shore distress alert

4. Ship-to-ship distress alerting is primarily based on…

1. digital selective calling in the VHF and MF bands

5. What does RCC stand for?

1. Rescue Coordinating Centre

6. What does MSI stand for?

1. Maritime Safety Information

7. Which equipment on the bridge is used for locating a SART?

1. 3 cm (9 GHz) Radar

8. Which VHF channel shall be used for bridge-to-bridge communications concerning safety of navigation and maneuvering in the GMDSS?

1. Channel 13

9. On which VHF DSC channel shall all GMDSS equipped ships keep watch?

1. Channel 70

10. Which is the distress and safety frequency for MF DSC?

1. 2187.5 kHz

11. What is the coverage of Inmarsat's geostationary satellites?

1. Global except the polar areas

12. What is false regarding the Inmarsat EPIRB?

1. Global coverage

13. What is false regarding the COSPAS/SARSAT EPIRB?

1. Global coverage except from the polar regions

14. What is the name of the international convention that regulates GMDSS?

1. SOLAS

15. You have received the 9-digit MMSI of a ship in distress. In which ITU publication can you find the name of the ship?

1. List of call signs and numerical identities

area A1 means an area ........

1. within coverage of at least one Coast Station with VHF DSC and telephony

area A2 means an area ........

1. within coverage of at least one coast station with MF DSC and telephony

area A3 means an area ........

1. within coverage of an Inmarsat geostationary satellite

area A4 means an area .......

1. outside A1, A2 and A3

20. What is the speed of radio waves?

1. Speed of light

21. What is the most important factor for the range of a VHF station?

1. The height of the antenna

22. What is the most important factor for the range of an HF station?

1. The frequency

23. J3E is used for .......

1. SSB radiotelephony

24. F1B is used for ........

1. TLX radiotelex

25. F3E is used for ........

1. VHF telephony

26. What is the function of squelch?

1. Eliminates audio noise when there is no traffic

27. Why is channel 16 a simplex channel?

1. Every ship within coverage shall be able to hear and communicate

28. What are the three first digits in a ship's MMSI indicating, for example 26501010?

1. The nationality of the ship

29. What is false regarding the ARQ mode in radiotelex?

1. Distress communications using radiotelex shall be established in the ARQ mode

30. What is false regarding the FEC mode in radiotelex?

1. It practically guarantees error-free data

31. How must a satellite antenna be mounted for approval in the GMDSS?

1. With free line of sight in every direction

32. Why shall the SART be mounted as high as possible in the survival craft?

1. To increase the range

33. For how long time should an EPIRB be able to operate on its batteries?

1. 48 hours

34. Vessels operating in which sea area(s) are required to carry either INMARSAT or HF equipment or a combination thereof under GMDSS?

1. A3