Random1 Flashcards
Which waves are line of sight?
Space waves (VHF) and microwaves (UHF - EHF)
High frequency waves have long wave lengths. True or False?
False. HF waves have short wave lengths and LF waves have long wave lengths.
Which waves uses the properties of the ionosphere ?
HF waves. Sky waves.
What does CPDLC stand for?
Controller Pilot Data Link Communication.
Which waves can be used to reach satellites?
Microwaves (UHF - EHF)
What are the benefits of SATVOICE?
• Reduces the risk of communication failure hence improving safety and efficiency of operations.
• Provides direct controller-pilot communication.
• Alleviates HF/VHF channel congestion.
What are the advantages of SATCOM?
• Improve communications
• Mobility
• Provides coverage over the globe
• Cost savings over long distances
What are some disadvantages of SATCOM?
- Cost
- Propagation delay
- Specialized satellite terminals required
- Poor coverage in polar regions.
- Deficiency of satellite components
- Satellite communication is disturbed by sun outages.
How is CPDLC represented on the flight plan?
By inserting “J” in the 10b and COM/CPDLC in item 18.
CPDLC greatly improves communication capabilities in oceanic and remote airspace. True or False.
True.
Which phase of flight uses more fuel?
CCO. The climb phase uses a significant proportion of the total flight fuel.
What are the advantages of CDO?
Reduction in CO2 emissions
Reduction in fuel
Reduction in noise
What are the advantages of CCO?
• Fuel efficiency
• Reductions in workload
• Reduction in the number of required radio transmissions.
• Environmental benefits.
How many satellites are needed to establish 3D positions and time?
At least 4.
What are radio repeaters used for?
They are used when two stations are not in line of sight so that they may be able to communicate through an intermediate radio repeater station.
