A vessel is experiencing problems tracking...

Question 1 / 20jtZFJgzvPS55GxJbJxEw

Question 1 of 20jtZFJgzvPS55GxJbJxEw

A vessel is experiencing problems tracking the satellite in an Inmarsat-C SES while at sea. The problem is least likely caused by?

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Question 1 of 20

jtZFJgzvPS55GxJbJxEw

A vessel is experiencing problems tracking the satellite in an Inmarsat-C SES while at sea. The problem is least likely caused by?

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🔍 Key Concepts

• Inmarsat-C frequency band (L-band ~1.5–1.6 GHz) and how sensitive it is to rain/snow compared with higher bands like Ku/Ka • Effects of physical blockage (shadowing) and local RF interference on satellite earth stations • What happens to signal strength when operating near the edge of a satellite’s coverage footprint

💭 Think About

• Which of the listed factors is known to cause strong signal attenuation at higher frequencies, but has much less impact in the L-band used by Inmarsat-C? • Think about normal, practical causes of losing lock on a geostationary satellite aboard ship: which ones are routinely seen as problems on vessels at sea, and which one is more associated with other satellite services? • If you were troubleshooting on board, which three items would you seriously investigate first, and which one would you put at the bottom of your list for an Inmarsat-C system?

✅ Before You Answer

• Verify which band Inmarsat-C uses and how that band behaves in heavy precipitation (rain fade characteristics). • Confirm that shadowing/obstruction and local RF interference are well-known, documented causes of SES tracking or lock problems. • Check how operating at the fringe of a satellite’s coverage area typically affects the terminal’s ability to track and maintain a reliable link.

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Question 1 of 20

A vessel is experiencing problems tracking the satellite in an Inmarsat-C SES while at sea. The problem is least likely caused by?

Extremely heavy rain/snowstorms.

Local RF interference by in- port cell phone or other radio systems.

Shadowing caused by an obstacle, such as a mast, between the SES antenna and the satellite.

The vessel is on the fringe of the coverage area of the satellite.

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Question 1 / 20jtZFJgzvPS55GxJbJxEw

Question 1 of 20jtZFJgzvPS55GxJbJxEw

A vessel is experiencing problems tracking the satellite in an Inmarsat-C SES while at sea. The problem is least likely caused by?

Back

Question 1 of 20

jtZFJgzvPS55GxJbJxEw

A vessel is experiencing problems tracking the satellite in an Inmarsat-C SES while at sea. The problem is least likely caused by?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed