Coastal Riverine Force

The Coastal Riverine Force (CORIVFOR) is a unit of the United States Navy within the organizational structure of the Navy Expeditionary Combat Command (NECC). The unit was established following the merger of Riverine Group 1 and the Maritime Expeditionary Security Group 2 (MESG 2) on June 1, 2012. Its express purpose is to provide port and harbor security, and offshore protection for maritime infrastructure and Military Sealift Command ships operating in coastal waterways.

Groups
The unit is composed of two Echelon IV groups:
 * Coastal Riverine Group One (CORIVGRU 1), homeported in Imperial Beach, California, with squadrons at Naval Amphibious Base Coronado (NAB Coronado)
 * Coastal Riverine Group Two (CORIVGRU 2), homeported in Portsmouth, Virginia, with squadrons at the Norfolk Naval Shipyard and at Joint Expeditionary Base Little Creek-Fort Story (JEBLC-FS), a forward deployed detachment in Bahrain, and reserve squadrons in Newport, Rhode Island and Jacksonville, Florida.

Personnel and equipment
As of October 2012, the unit had 113 boats, ranging from rubber combat raiding crafts to 53-foot command boats. It also had 2,657 active and 2,507 reserve personnel.