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