Gmdss : Element 7 - 383/600
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| What is the purpose of the second I.D. in an Inmarsat-B SES? |
| A) To provide an additional number which may be dedicated to computers, fax, etc. |
| B) To provide an alternate number which may be called if a busy signal is received by the calling party. |
| C) To provide an additional speech path, which may be used to communicate while the first channel is engaged in active communications. |
| D) To provide for an emergency working frequency. |
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