Expeditionary Fast Transport (EPF)

Expeditionary Fast Transport (EPF)
Name	USNS Spearhead (as class lead)
Builder	Austal USA
Introduced	2012
Role	Transport and sealift
Displacement	~2,400 tonnes
Length	103 m
Beam	28.5 m
Speed	35+ knots
Capacity	600 short tons
Propulsion	diesel engines, waterjets
Complement	~41 civilian mariners, 20 mission personnel

Expeditionary Fast Transport (EPF) is a class of high-speed, shallow-draft transport vessels operated principally by the United States Navy's Military Sealift Command and designed for rapid intra-theater movement of personnel, vehicles, and equipment. The type emphasizes modularity, logistics support, and interoperability with amphibious and littoral forces during humanitarian assistance, disaster relief, and contingency operations. EPFs blend commercial catamaran architecture with naval features to meet requirements set by defense acquisition authorities and regional combatant commands.

Design and specifications

The class uses a wave-piercing aluminum catamaran hull derived from commercial fast ferries built by Austal USA and influenced by designs evaluated by Office of Naval Research and Naval Sea Systems Command. Main dimensions include a length of about 103 meters and a beam near 28.5 meters, producing a shallow draft suitable for littoral access and operations in archipelagic areas such as the South China Sea and Philippine Sea. Propulsion consists of four diesel engines driving waterjets to achieve sustained speeds above 35 knots, enabling rapid transits between ports used by U.S. Indo-Pacific Command, U.S. Central Command, and U.S. Southern Command. Cargo capacity is roughly 600 short tons on a reconfigurable mission deck with roll-on/roll-off access, compatible with vehicles like the M-ATV and logistics trailers used by U.S. Army units. The flight deck supports helicopter operations for rotary-wing types including the MH-60R Seahawk and CH-53E Super Stallion under specific operating conditions, while the mission bay can be fitted with containerized modules for medical treatment, command-and-control suites, or humanitarian assistance as requested by United States Transportation Command or U.S. Pacific Fleet task groups.

Development and procurement

The EPF program originated from capability studies sponsored by U.S. Navy acquisition offices and requirements articulated by United States Marine Corps and naval logistics planners seeking rapid intra-theater sealift during operations like Operation Iraqi Freedom and contingency planning in the Horn of Africa. Austal USA won initial contracts following competitive procurements administered by Naval Sea Systems Command and the Naval Sea Systems Command Office of Small Business Programs with oversight from the Department of Defense acquisition workforce. Construction occurred at Austal's shipyard in Mobile, Alabama, where block fabrication and modular assembly techniques familiar from commercial shipbuilding were adapted to meet Defense Acquisition Program milestones and Federal Acquisition Regulation compliance. The class was procured in multiple hulls under contracts featuring options for follow-on ships, and lifecycle support agreements were negotiated with Military Sealift Command for civilian mariner crewing and Northrop Grumman-style logistics sustainment models.

Operational history

EPFs entered service beginning in 2012, with deployments supporting exercises such as Rim of the Pacific Exercise and operations including humanitarian responses after natural disasters in the Caribbean and Indian Ocean. Units have performed intra-theater lift missions for U.S. Army South and U.S. Marine Corps Forces Pacific, participated in partnership engagements with navies like the Royal Australian Navy and Japan Maritime Self-Defense Force, and enabled logistics surges during contingency operations directed by U.S. European Command. EPFs have also been used for Special Operations support, embryo mine countermeasure staging, and as test platforms for distributed maritime operations concepts being evaluated by Chief of Naval Operations planners and Office of the Secretary of Defense analysts. Their speed and shallow draft allowed access to austere ports and littoral areas that challenge conventional sealift such as those encountered in exercises with Philippine Navy and Pacific island partners.

Variants and modifications

Several hulls have undergone missionization to expand capabilities beyond pure transport. Modifications included enhanced communications suites integrating systems from providers aligned with Defense Information Systems Agency standards, installation of self-defense mounts compatible with weapons used by U.S. Navy escorts, and reconfiguration of the mission bay for roles resembling a sea-basing node supporting Marine Expeditionary Unit prepositioning. Proposals and demonstration variants evaluated by Office of Naval Research explored integrating mine-countermeasure modules, medical treatment facilities akin to expeditionary hospitals used by U.S. Navy Hospital Ship USNS Mercy (T-AH-19), and aviation expansions for increased rotary-wing sortie generation in coordination with Carrier Strike Group logistics trains.

Crewing and operations

EPFs are crewed primarily by civilian mariners employed by Military Sealift Command with embarked mission personnel from organizations such as U.S. Marine Corps detachments, U.S. Army logistics units, and interagency teams. The civilian mariner complement follows Merchant Marine Act of 1936-influenced crewing practices and integrates with Navy operational commanders during tasking by U.S. Transportation Command. Standard operating procedures align with International Maritime Organization conventions for safety and navigation while incorporating Navy command relationships when assigned to task groups. The ships’ automation and commercial design reduce required crewing levels compared with traditional Amphibious Transport Dock vessels, enabling cost-effective surge sealift and theater distribution missions.

Incidents and accidents

EPFs have experienced operational incidents including hull and propulsion malfunctions, as well as a notable grounding and subsequent investigations involving seamanship and navigational protocols overseen by Navy Region authorities. Some units required interim repairs after corrosion or fatigue issues typical of aluminum-hulled high-speed craft, prompting corrective actions directed by Naval Sea Systems Command engineering offices and contractor support from Austal. Safety reviews and lessons learned were incorporated into maintenance schedules and training overseen by Military Sealift Command and Naval Safety Center to mitigate recurrence and improve reliability for future high-tempo deployments.

Category:United States Navy ship classes