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Standing the watch
Standing the watch during a High Value Asset mission

Information About Us

 Maritime Expeditionary Security Squadrons (MSRON) were commissioned in the wake of terrorist attacks abroad, like the 2000 bombing of the USS Cole (DDG 67).  MSRON'S provide rapidly deployable point defense personnel and assets for Force Protection/Anti-terrorism operations in support of the numbered Fleet Commanders.

Maritime Expeditionary Security Squadrons FIVE (MSRON 5) was commissioned in February 2 of 2006, located on NOLF in San Diego, CA.  The Squadron consists of staff, - Maritime Expeditionary Security Detachments, - Maritime Expeditionary Boat Detachments, and - Maritime Expedionary Communications Detachments.  

Squadrons and Detachments are made up of multiple rates: Boatswains Mate, Master-at-Arms, Information System Technicians, Intelligence Specialists, Engineman, Yeoman, Personnel Specialists, Electronics Technicians, Fire Controlman, Hospital Corpsman, Gunner's Mates, Operation Specialists, and Construction Mechanics.

MSRON-5's Immediate Superior in Command (ISIC) is Maritime Expedionary Security Group One, Imperial Beach, CA and Type Commander (TYCOM) is Navy Expedionary Combat Command, Little Creek, VA.

MSRON-5 is located on Navy Out Lying Field Imperial Beach off of 13th street in Imperial Beach, California.

Due to the overwhelming demand for AT/FP support, a typical sailor assigned to one of the Detachments can expect to spend some of their time deployed.  Missions include but are not limited to: small boat support/escort, picket boat operations, close-in protection of shore parties in high threat areas, embarked security teams, oil-platform security, training with foreign national military, and other high threat protection missions. In addition, each sailor must maintain proficiency in field security operations in support of expeditionary warfare missions.

MSRON-5 has a very aggressive detachment training cycle.  This cycle includes workups and training that culminate in three one-week field exercises over the deployment cycle.  During these field exercises, the detachments are trained and evaluated in campsite operations, field security operations, airfield security, pierside asset defense, VIP security and High Value Asset (HVA) high threat choke point transits.  The first two exercises are the initial assessment (IA) and Unit Level Training and Readiness Assessment (ULTRA) workup exercises.  The cycle culminates in the Final Evaluation Problem (FEP) where the detachments are certified for deployment.


  • The MESF's primary mission is force protection conducted through fleet support with operations around the world. Anti-terrorism and force protection missions include harbor and homeland defense, coastal surveillance, and special missions. Specialized units work together with MESF squadron staffs providing intelligence and communications.



  • Provides centralized planning, control, training, coordination, equipping, and integration of coastal warfare assets trained to operate in high density, multi-threat environments. Units conduct force protection of strategic shipping and naval vessels operating in the inshore and coastal assets, anchorages and harbors, from bare beach to sophisticated port facilities." Members of this community are highly encouraged to earn their Expeditionary Warfare Specialist Designation.




    “These elite, highly trained - active and reserve Sailors - provide a flexible, task organized and global expeditionary force protection capability to the Combatant Commanders. Every day there are over a thousand Maritime Expeditionary Security Force Sailors deployed world - wide protecting our most valuable maritime assets and infrastructure - enabling the Nation’s general purpose and special operations forces in the conduct of their missions.”

    Captain Richard W. Daniel, Commander Maritime Expeditionary Security Group 1