7R-A-31: EPIRB: System Structure & Operation
7R-31E1:
Which is a function of a satellite under COSPAS-SARSAT using satellite EPIRBs?
All of these
Relayed satellite message includes the EPIRB ID number which provides a reference for retrieval of vessel information from the shore database.
Doppler shift of EPIRB signal is measured.
Information received from EPIRBs are time-tagged and transmitted to any Local User Terminal in the satellite's view.
7R-31E2:
Which of the following satellite systems is of particular importance to search and rescue missions under GMDSS?
COSPAS/SARSAT
AMSAT
NASA/Arienne
COMSAT
7R-31E3:
Which of the following statements concerning COSPAS-SARSAT is true?
All of the above.
EPIRBs are units that are used as alerting devices.
These are satellites in a low-earth polar orbit that detect EPIRB beacons on 406 MHz and relay the information to a Local User Terminal (LUT).
The Doppler frequency measurement concept is used to determine the EPIRB's location.
7R-31E4:
Which of the following statements concerning COSPAS-SARSAT is false?
After initiating a call request and selecting the CES, these satellites may be used for commercial messages.
EPIRBs are used primarily for Distress alerting.
These satellites are looking for EPIRB signals on 406 MHz.
These satellites use Doppler shift measurement to determine the location of the beacons.
7R-31E5:
Which of the following statements concerning the EPIRB system is true?
The Inmarsat system will not provide alerts and position report for 406 Mhz EPIRBs equipped with GPS receivers.
GOES weather satellites will provide alerting with worldwide coverage.
The COSPAS-SARSAT system always provides an alert and position report within 5-20 minutes of reception.
The GPS satellite system will provide an alert and position report within 20 minutes of reception.
7R-31E6:
Which of the following statements concerning satellite EPIRBs is true?
Once activated, these EPIRBs transmit a signal for use in identifying the vessel and for determining the position of the beacon.
The coded signal identifies the nature of the Distress situation.
The coded signal only identifies the vessel's name and port of registry.
If the GMDSS Radio Operator does not program the EPIRB, it will transmit default information such as the follow-on communications frequency and mode.
|
Color key:
|
|
● = Unseen
|
|
● = Weak
|
|
● = Review
|
|
● = Learned
|
|
● = Incorrect answer
|
