GMDSS

GMDSS: How long should the radio batteries last in the GMDSS station in case of a black-out? (If the vessel is equipped with an emergency generator)

1 hour

GMDSS: How many Hz (Hertz) are there in 1 MHz?

1,000,000 Hz

"1.GMDSS: What will be the resulting capacity and voltage of two 12 V, 100 Ah parallel coupled batteries?"

12 Volts, 200 A/H

GMDSS: How many NAVAREAs are there in the world?

16

GMDSS: You have received a distress alert on MF DSC. On what frequency would you acknowledge the call if no coast station has acknowledged?

2187.5 kHz

GMDSS: What transmitting frequency should be used on MF DSC if you want to call a foreign coast station and you do not know the national channel?

2189.5 kHz

GMDSS: What is the approximate maximum range for VHF telephony?

30 to 50 nautical miles

GMDSS: What is the speed of radio waves in air?

300,000 km per second

GMDSS: Four 12 Volt lead-acid batteries are connected in series. Each battery has a capacity of 50 Ah. How long would these batteries run a radio station that drains 10 A?

5 hours

GMDSS: The wavelength of a radio signal is found by the formula: wavelength equals 300,000 divided by the frequency in kHz. What wavelength is the frequency 500 kHz?

600 meters

GMDSS: What signal can trigger a SART?

A distress signal

In GMDSS, there are sea areas A1, A2, A3 and A4. Which area is described as: sea area that is covered by coast stations equipped with VHF DSC?

A1

GMDSS: What natural phenomena is useful for propagation of high frequency (HF) radio waves?

As many sun spots as possible

GMDSS: A Cospas/Sarsat EPIRB does not transmit the vessels position. How can the LUT (Local User Terminal) stations determine the vessels position?

By doppler effect

GMDSS: Ohm's Law describes the connection between voltage (E), current (I) and resistance (R) in an electrical circuit (E= I x R). How could you find the current if both voltage and resistance are known?

I = E / R

GMDSS: What radio transceivers may normally be used when the vessel is in port?

Inmarsat systems and VHF transceiver

GMDSS: What identification is used in a DSC?

MMSI number

GMDSS: You are on board the M/V Star/D5DF and have received a distress message from M/V Spiro/C6GFD. What is correct acknowledgement of this distress message?

Mayday Spiro Spiro Spiro C6GFD this is Star Star Star D5DF, Received Mayday

GMDSS: Your vessel is in distress and you want to utilise the Inmarsat A terminal for alerting. Which priority would you use to be able to be automatically connected to the RCC?

Priority 3

GMDSS: What radio equipment utilises the mode F1B?

Radio Telex

GMDSS: What is the unit of electrical current?

The Ampere

GMDSS: What do we call the special atmospheric layer that reflects high frequency (HF) radio waves?

The Ionosphere

GMDSS: What is the unit of electrical potential?

The Volt

GMDSS: What is a DUPLEX radio connection?

The transmitting frequency is different from the receiving frequency

GMDSS: You want to call a foreign coast station on MF DSC and you do not know the national channel. What frequency would you use for transmitting and for receiving?

Transmit on 2189.5 kHz, receive on 2177.0 kHz