Gmdss : Element 7 - 482/600
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| An ITU simplex channel frequency assignment is defined as: |
| A) Transmit and receive frequencies must be different. |
| B) Transmit and receive frequencies must be identical. |
| C) Transmit and receive frequencies may be different, depending on whether communications are ship-shore or ship to ship. |
| D) Transmit and receive frequencies are different regardless of emission mode. |
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