Why must all MF-HF Distress, Urgency and...

Question 1 / 20gVWY5KDKAWalKXFmEhlk

Question 1 of 20gVWY5KDKAWalKXFmEhlk

Why must all MF-HF Distress, Urgency and Safety communications take place solely on the 6 assigned frequencies and in the simplex operating mode?

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Question 1 of 20

gVWY5KDKAWalKXFmEhlk

Why must all MF-HF Distress, Urgency and Safety communications take place solely on the 6 assigned frequencies and in the simplex operating mode?

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🔍 Key Concepts

• GMDSS MF-HF distress and safety frequencies and how many are specifically designated for voice after a DSC alert • Difference between simplex and duplex operation, and which mode allows the greatest number of ships to monitor the same channel • Purpose of using internationally standardized frequencies for distress, urgency, and safety traffic

💭 Think About

• Ask yourself: Which choices focus on making sure as many ships as possible can hear and respond to distress-related traffic on MF-HF? • Which answers are consistent with the idea that everyone listens on the same common frequencies after a DSC alert? • Does any option incorrectly suggest that only one station (like an RCC or coast station) should hear the traffic, instead of all ships in range?

✅ Before You Answer

• Verify which MF-HF distress and safety frequencies are designated for radiotelephony (voice) and that they are simplex channels • Check that GMDSS and DSC procedures require follow‑up voice traffic on specific, internationally agreed channels after a DSC alert • Make sure the correct option supports maximum reception by all ships within range, not just selective reception by one station

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Question 1 of 20

Why must all MF-HF Distress, Urgency and Safety communications take place solely on the 6 assigned frequencies and in the simplex operating mode?

For non-GMDSS ships, to maximize the chances for other vessels to receive those communications.

Answers a) and c ) are both correct.

For GMDSS or DSC-equipped ships, to maximize the chances for other vessels to receive those communications following the transmission of a DSC call of the correct priority.

To enable an RCC or Coast station to only hear communications from the vessel actually in distress.

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Question 1 / 20gVWY5KDKAWalKXFmEhlk

Question 1 of 20gVWY5KDKAWalKXFmEhlk

Why must all MF-HF Distress, Urgency and Safety communications take place solely on the 6 assigned frequencies and in the simplex operating mode?

Back

Question 1 of 20

gVWY5KDKAWalKXFmEhlk

Why must all MF-HF Distress, Urgency and Safety communications take place solely on the 6 assigned frequencies and in the simplex operating mode?

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?

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