Temporary for a specific time period for the following:
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Artillery shooting areas
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A failure of a lighthouse or racon of any ATON (Lighthouse or Buoys).
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Petroleum search operations within a certain concession area.
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(Broadcasted through radio stations) .
Navigational Alerts (Navigational Notices), permanent for the following :
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Fixing marine petroleum platforms.
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Marine communication cable.
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A submerged floating unit not salvaged or grounded.
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Any marine Installation jeopardizing safety of navigation