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Subel. I
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Element 7
(Valid until Apr 6, 2022)
This is an old (expired) question pool. Click here to go to the current version
Subelement I
Inmarsat Equip. & Comms:
Section 79
Equipment Faults and Maintenance-2:
79I1
What immediate remedy can be used to correct shadowing of the satellite signal by a shipboard obstruction?
A.
Relocate the mast or other obstruction.
B.
Raise the transmit power level.
Correct Answer
C.
Change the
ship
's course.
D.
Increase the receiver gain.
79I1
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79I2
A vessel loses Inmarsat-B SES operation after a large course change. Which of the following could most likely cause this?
A.
Shadowing of the SES antenna by clouds or other weather formations.
B.
Misalignment of the shadow correction filter.
C.
The vessel sailed beyond the footprint of the satellite coverage.
Correct Answer
D.
System
loses
gyro
follow-up or a
gyro
system
malfunction
.
79I2
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79I3
Which statement is correct regarding a method that a vessel experiencing problems with shadowing of an Inmarsat-B (or F77) SES antenna by an on-board obstruction could use to attempt reliable communications?
Correct Answer
A.
Change course to
remove
the shadow.
B.
Change the Coast Station ID programming.
C.
Install a shadow correction filter.
D.
Switch from TELEX to voice mode.
79I3
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79I4
Which of the following conditions does not typically impair Inmarsat-B communications ?
A.
An obstruction, such as a mast, blocking the signal between the satellite and the SES antenna when the vessel is steering a specific course.
Correct Answer
B.
Normal
precipitation
from
gales
and
storms
.
C.
A satellite whose signal is on a low elevation, below the horizon.
D.
Travel beyond the effective radius of the satellite.
79I4
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79I5
A vessel is experiencing problems tracking the satellite in an Inmarsat-C SES while at sea. The problem is least likely caused by?
A.
Extremely heavy rain/snow storms.
Correct Answer
B.
Local
RF
interference
by in-
port
cell
phone
or other
radio
systems.
C.
Shadowing caused by an obstacle, such as a mast, between the SES antenna and the satellite.
D.
The vessel is on the fringe of the coverage area of the satellite.
79I5
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79I6
Which functions may the holder of a GMDSS Radio Operator License not perform on the Inmarsat-C equipment?
A.
Selection of LES for routine traffic.
B.
Maintain the antenna clear of soot, paint, etc.
Correct Answer
C.
Adjust
the
azimuth
and
elevation
values.
D.
Logon, traffic and logoff functions.
79I6
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