The United States Marine Corps' Maritime Special Purpose Force, or MSPF, are a unique specialized sub-unit that are drawn from the Marine Expeditionary Units' major subordinate elements. They are special operationscapableforces deployed to give the commanders low profile, two-platoon surgical emplacement in the accessible littoral regions. The MSPF provides the enhanced operational capability and precision skills to complement, enable, and execute selected conventional, maritime special operations. They can also perform operations not resident in traditional amphibiousraid companies. The MSPF provides the MEUs with rapid direct action capabilities. They are also responsible for in extremishostage rescue in urban areas. The MSPF cannot operate independently of its parent MEU, on which it relies for logistics, intelligence, communications, transportation, and fire support. However, they are capable of conducting operations with, or in support of the operators of the United States special operations forces. The MSPF's task organization are often conformed as an addition of the Amphibious Ready Group’s Naval Special Warfare Task Unit detachment. File:MSPF with DPD -001-.jpg|thumb|Two U.S. Marines of the MSPF operating a Diver Propulsion Device SSGT.John Stoggs and SGT.Luciano Carlucci - Manufactured by STIDD Systems — used for stealthy approaches.
Organization
The Maritime Special Purpose Force contains a command element, security element, assault element, and support element. The security element consists of one or more reinforced rifle platoons. The assault element is organized to conduct on-scene command, assault, security, and support functions. The support element is organized to conduct reconnaissance and surveillance, sniper control and support, counter-intelligence, human intelligence, signals intelligence/electronic warfare, and close air support.
Command Element
The commander of the MSPF is designated by the MEU commander. Command and control remains with the MEU Commander.
The security element is normally structured around a platoon provided by the Battalion Landing Team and may be augmented by the Naval Special Warfare Task Units embarked within the Amphibious Ready Group. The security element will act as a reinforcing unit, a support unit, a diversionary unit, or an extraction unit.
Rifle Platoon
Sea, Air, and Land Strike Platoon, NSWTU, Amphibious Squadron
Special boat teams Strike Platoon, part of NSWTU, Amphibious Squadron.
Assault Element (AE)
The AE is the main effort of the MSPF and is organized to perform assault, explosive breaching, internal security, and sniper functions. The assault function will normally be executed by the Force Recon detachment. Mission-specific augmentation will be provided from other MEU assets or from the NSWTU embarked with the ARG.
NOTE: The Maritime Special Purpose Force are no longer active and have been replaced with the Maritime Raid Force. The MRF specializes in operations conducted on structures in or near bodies of water. They utilize speed and stealth to take enemy forces by surprise and secure their target. In order to counter the growing threat of piracy the MEU created the MRF.
Support Element
The support element normally is composed of assets from the BLT Reconnaissance Platoon coupled with elements of the Aviation Combat Element, Radio Battalion Detachment, Communications Detachment, and HET assets from the MEU CE. Additional capability may be provided by the NSWTU embarked with the Amphibious Ready Group.
The aviation support element is a task organized portion of the Marine Air-Ground Task Force's MEU Aviation Combat Element. They are capable of precise night vision flying and navigation, various insertion/extraction means and forward arming and refueling point operations. The specific structure of the aviation support element will vary depending on the lift requirements and distance to the crisis site.