Which of the following frequencies is...

Question 1 / 27070uRQYYG0oYa9WtpTbHnjN

Question 1 of 27070uRQYYG0oYa9WtpTbHnjN

Which of the following frequencies is designated for On-scene Distress and Safety communications?

Question 1 of 27070

Which of the following frequencies is designated for On-scene Distress and Safety communications?

🔍 Key Concepts

• GMDSS distress, urgency, and safety frequencies in the MF/HF bands • The difference between NAVTEX broadcast frequencies and two-way on‑scene communications • How DSC/NBDP frequencies differ from voice or on‑scene working channels

💭 Think About

• First, identify which of the listed frequencies are used for NAVTEX safety broadcasts rather than for two‑way conversations between ships and rescue units. • Then, consider which of the remaining frequencies is specifically identified in GMDSS tables as an on‑scene distress and safety communication frequency (used after initial alerting to coordinate SAR). • Ask yourself: which frequency would you actually use to talk/communicate back and forth on scene, rather than just receive automatic safety information?

✅ Before You Answer

• Verify which two frequencies (in kHz) are standard NAVTEX broadcast channels and eliminate them as on‑scene options. • Check ITU/USCG tables for which MF/HF distress‑related frequencies are labeled for on‑scene distress and safety communications, not just for initial alerting. • Confirm that the frequency you choose is intended for two‑way on‑scene coordination (ship–ship or ship–SAR unit), not for one‑way broadcasts or DSC only.

Question 1 of 27070

Which of the following frequencies is designated for On-scene Distress and Safety communications?

4209.5 kHz

2174 .5 kHz

518.0 kHz

490.0 kHz

Question 1 / 27070uRQYYG0oYa9WtpTbHnjN

Question 1 of 27070uRQYYG0oYa9WtpTbHnjN

Which of the following frequencies is designated for On-scene Distress and Safety communications?

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Question 1 of 27070

Which of the following frequencies is designated for On-scene Distress and Safety communications?