1. A geographical area under the administrative and operational control of a navy, typically used for military organization and command structure
The Atlantic naval region is responsible for patrolling the eastern coast.
A região naval do Atlântico é responsável pela patrulha da costa oriental.
2. A division of a country's navy organized by geographic territory
Each naval region maintains its own fleet headquarters.
Cada região naval mantém seu próprio quartel-general da frota.