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| What is the fundamental purpose for imposing radio silence? |
| A) To ensure that a distressed vessel will have a "window" twice each hour for transmitting routine messages |
| B) To ensure that interference on a particular frequency or channel to communications concerning emergency traffic is minimized |
| C) To ensure that only voice communications can be effected on the distress frequency or channel |
| D) To ensure that interference to proprietary communications is minimized |
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