CASTLE (UNDF code)

CASTLE was an United Nations Defense Force code, ordering all active vessels to go to an immediate alert. There were several subsection cases for the code: GREEN, BLUE, and RED. CASTLE CASE GREEN placed vessels on alert, but did not require them to deviate from their immediate duties. CASTLE CASE BLUE placed ships on combat alert, and required all patrolling ship to make speed to their rally points. Finally, CASTLE CASE RED placed all ships on combat alert, and ordered them to make haste to their rally points; additionally, all inner system ships were to make all speed to Earth.