Free GMDSS Navigation and Communication Questions and Answers

Question 1

Equipment for radiotelephony use in survival craft stations under GMDSS must have what characteristic(s)?

Accepted Answer

All of these

Answer

Explanation:
Equipment for radiotelephony use in survival craft stations under GMDSS must have several characteristics to ensure effective communication during distress situations. These characteristics typically include the ability to operate on Channel 16 (the international distress and calling frequency), having a permanently fixed antenna for reliable transmission, and being watertight to withstand harsh maritime conditions. Therefore, all the characteristics listed must be met by equipment used in survival craft stations under GMDSS regulations.

Question 2

How are paired NBDP frequencies normally used?

Accepted Answer

These are normally used for ARQ communications with coast radio stations.

Answer

Explanation:
Paired NBDP (Narrow-Band Direct Printing) frequencies are typically used for ARQ (Automatic Repeat reQuest) communications with coast radio stations. ARQ is a data transmission protocol used to ensure the reliable delivery of messages over a radio link. In ARQ communications, data packets are sent from one station to another, and the receiving station acknowledges the receipt of each packet. If a packet is not received correctly, it is automatically retransmitted until it is successfully received. Therefore, paired NBDP frequencies are used for ARQ communications to facilitate reliable data exchange between ships and coast radio stations.

Question 3

To set up the MF/HF Transceiver for a voice call to a coast station, the operator must:

Accepted Answer

Select J3E mode for proper voice operations.

Answer

Explanation:
To set up the MF/HF Transceiver for a voice call to a coast station, the operator must select J3E mode. J3E mode is the appropriate mode for voice communications in the High-Frequency (HF) band. It is commonly used for transmitting voice signals over long distances with good audio quality and efficiency. Therefore, selecting J3E mode ensures proper voice operations during the call.

Question 4

Which statement is NOT true regarding the COSPAS-SARSAT system?

Accepted Answer

May be used to transmit public correspondence.

Answer

Explanation:
The COSPAS-SARSAT system is primarily designed for search and rescue operations, specifically to locate and assist distressed vessels, aircraft, and individuals. While it utilizes Doppler shift to locate distress beacons transmitting on 406 MHz and EPIRBs are used as satellite beacons aboard lifeboats as alerting devices, it is not intended for transmitting public correspondence. The system's main function is to detect and relay distress signals to search and rescue authorities for prompt action, rather than facilitating general communication. Therefore, the statement that COSPAS-SARSAT may be used to transmit public correspondence is not true.

Question 5

Equipment for radiotelephony use in survival craft stations under GMDSS must have what capability?

Accepted Answer

Operation on Ch-16

Answer

Explanation:
Equipment for radiotelephony use in survival craft stations under GMDSS (Global Maritime Distress and Safety System) must have the capability to operate on Channel 16. Channel 16 is the international distress and calling frequency designated for maritime communication. It is monitored continuously by maritime authorities and other vessels to coordinate distress, safety, and emergency communications. Therefore, operation on Channel 16 is a crucial requirement for survival craft stations to ensure effective communication during distress situations.

GMDSS - Global Maritime Distress and Safety System Practice Test

GMDSS - Global Maritime Distress and Safety System Practice Test

Free GMDSS Navigation and Communication Questions and Answers