Which of the following systems is least...

Question 1 / 27070XmXOjNG5aEyuOmZ09ouZ

Question 1 of 27070XmXOjNG5aEyuOmZ09ouZ

Which of the following systems is least susceptible to fading or static interference?

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Question 1 of 27070

Q

Which of the following systems is least susceptible to fading or static interference?

🔍 Key Concepts

• Propagation characteristics of HF, MF, and VHF radio (skywave vs line-of-sight) • How satellite communications work compared to terrestrial radio • Which systems are most affected by ionospheric conditions, static, and fading

💭 Think About

• For each option, ask yourself: does this system depend on the ionosphere or ground/skywave propagation? • Which frequency bands are generally more prone to static, atmospheric noise, and fading: HF/MF or satellite-frequency links? • Is the signal path mostly line-of-sight through space, or does it travel long distances through the lower atmosphere and ionosphere?

✅ Before You Answer

• Identify which choices use HF/MF radio and are therefore subject to ionospheric fading and atmospheric noise • Identify which choice relies on a satellite link rather than direct HF/MF/VHF propagation • Confirm which system is specifically designed to provide very reliable, low-interference connectivity for GMDSS (Global Maritime Distress and Safety System)

Question 1 of 27070

Q

Which of the following systems is least susceptible to fading or static interference?

A

HF SITOR (NBDP)

B

MF-HF DSC Controller

C

VHF ARQ

D

Inmarsat

Question 1 / 27070XmXOjNG5aEyuOmZ09ouZ

Question 1 of 27070XmXOjNG5aEyuOmZ09ouZ

Which of the following systems is least susceptible to fading or static interference?

Back

Question 1 of 27070

Q

Which of the following systems is least susceptible to fading or static interference?

🔍 Key Concepts

• Propagation characteristics of HF, MF, and VHF radio (skywave vs line-of-sight) • How satellite communications work compared to terrestrial radio • Which systems are most affected by ionospheric conditions, static, and fading

💭 Think About

• For each option, ask yourself: does this system depend on the ionosphere or ground/skywave propagation? • Which frequency bands are generally more prone to static, atmospheric noise, and fading: HF/MF or satellite-frequency links? • Is the signal path mostly line-of-sight through space, or does it travel long distances through the lower atmosphere and ionosphere?

✅ Before You Answer

• Identify which choices use HF/MF radio and are therefore subject to ionospheric fading and atmospheric noise • Identify which choice relies on a satellite link rather than direct HF/MF/VHF propagation • Confirm which system is specifically designed to provide very reliable, low-interference connectivity for GMDSS (Global Maritime Distress and Safety System)