coastal frontier meaning

• [Defence]
  A geographic division of a coastal area, established for organization and command purposes in order to ensure the effective coordination of military forces employed in military operations within the coastal frontier area.

• coastal:    Adjective: coastal ...
• frontier:    Noun: frontier&nbs ...
• coastal berm:    [Civil engineering ...

Examples

1. These orders were modified under date of March 1, 1941, giving Admiral Andrews additional duties as Commander, North Atlantic Naval Coastal Frontier.
2. On April 22, 1941, a third plan was issued : the original Operation Plan for the Forces of the North Atlantic Naval Coastal Frontier.
3. On January 26, 2007, Peru's government issued a protest against Chile's demarcation of the coastal frontier the two countries share.
4. After President Franklin D . Roosevelt designated the Caribbean as a coastal frontier, the Eastern Caribbean became the forward edge of American defense strategy during the war.
5. On July 1, 1941, the Chief of Naval Operations formally established several Naval Coastal Frontiers; on February 6, 1942, these were renamed Sea Frontiers.