Integrated Sea Trials

USNS Puerto Rico (EPF-11), successfully completed the first integrated sea trials for an Expeditionary Fast Transport (EPF) ship August 22. The ship returned to the Austal USA shipyard following two days underway in the Gulf of Mexico.

Mobile, Alabama USNS Puerto Rico (EPF-11) successfully completed the first integrated sea trials for an Expeditionary Fast Transport ship August 22. Integrated Trials combine Builder’s and Acceptance Trials, allowing for the shipyard to demonstrate to the Navy’s Board of Inspection and Survey the operational capability and mission readiness of all the ship’s systems during a single underway period (Photo by Austal USA)

Integrated Trials combine Builder’s and Acceptance Trials, allowing for the shipyard to demonstrate to the Navy’s Board of Inspection and Survey the operational capability and mission readiness of all the ship’s systems during a single underway period. During trials, the shipbuilder conducted comprehensive tests to demonstrate the performance of all of the ship’s major systems.

«The EPF program continues to be an example of stable and successful serial ship production», said Captain Scot Searles, Strategic and Theater Sealift program manager, Program Executive Office (PEO) Ships. «I look forward to seeing EPF-11 deliver in the fall and expand the operational flexibility available to our combatant commanders».

Expeditionary Fast Transport Ships are non-combatant vessels designed to operate in shallow-draft ports and waterways, increasing operational flexibility for a wide range of activities including maneuver and sustainment, relief operations in small or damaged ports, flexible logistics support, or as the key enabler for rapid transport. The ships are capable of interfacing with roll-on/roll-off discharge facilities, as well as on/off-loading vehicles such as a fully combat-loaded Abrams Main Battle Tank.

EPFs support a variety of missions including the overseas contingency operations, conducting humanitarian assistance and disaster relief, supporting special operations forces, and supporting emerging joint sea-basing concepts.

In addition to Puerto Rico, Austal USA is also currently in production on the future USNS Newport (EPF-12), and is under contract to build the future USNS Apalachicola (EPF-13) and EPF-14.

As one of the Defense Department’s largest acquisition organizations, PEO Ships is responsible for executing the development and procurement of all destroyers, amphibious ships, special mission and support ships, and boats and craft.

 

SPECIFICATIONS

PRINCIPAL DIMENSIONS
Material Hull and superstructure – aluminium alloy
Length overall 103 m/337.9 feet
Beam overall 28.5 m/93.5 feet
Hull draft (maximum) 3.83 m/12.57 feet
MISSION BAY
Area (with tie-downs) 1,863 m2/20,053 feet2
Clear Height 4.75 m/15.6 feet
Turning diameter 26.2 m/86.0 feet
ISO TEU (Twenty Equivalent Units) Stations 6 Interface Panels
ACCOMMODATIONS
Crew 41
Single SR 2
Double SR 6
Quad SR 7
Troop Seats 312
Troop Berths Permanent: 104
Temporary: 46
Galley and Messing 48
PROPULSION
Main Engines 4 × MTU 20V8000 M71L Diesel Engines 4 × 9.1 MW
Gear boxes 4 × ZF 60000NR2H Reduction Gears
Waterjets 4 × Wartsila WLD 1400 SR
PERFORMANCE
Average Speed 35 knots/40 mph/65 km/h @ 90% MCR with 635 mt (700 st) payload
Maximum Speed 43 knots/50 mph/80 km/h without payload
Maximum Transit Range 1,200 NM/1,381 miles/2,222 km
Self-Deployment Range 5,600 NM/6,444 miles/10,371 km
Survival Through SS-7
AVIATION FACILITIES
NAVAIR Level 1 Class 2 Certified Flight Deck for one helicopter
Centreline parking area for one helicopter
NAVAIR Level 1 class 4 Type 2 Certified VERTREP (Vertical Replenishment)
Helicopter Control Station
AUXILIARY SYSTEMS
Active Ride Control Transcom Interceptors
Foils: 3.24 m2/34.9 feet2 each, forward on inboard sides of demi-hulls
Vehicle Ramp Articulated Slewing Stern Ramp
Straight aft to 45 Starboard
Telescoping Boom Crane 12.3 mt @ 15 m, 18.2 mt @ 10 m/13.6 Lt @ 49.2 feet, 20.1 Lt @ 32.8 feet

 

Ships

USNS Spearhead (EPF-1), Delivered

USNS Choctaw County (EPF-2), Delivered

USNS Millinocket (EPF-3), Delivered

USNS Fall River (EPF-4), Delivered

USNS Trenton (EPF-5), Delivered

USNS Brunswick (EPF-6), Delivered

USNS Carson City (EPF-7), Delivered

USNS Yuma (EPF-8), Delivered

USNS City of Bismark (EPF-9), Delivered

USNS Burlington (EPF-10), Delivered

USNS Puerto Rico (EPF-11), Under construction

USNS Newport (EPF-12), Under construction

USNS Apalachicola (EPF-13), On order

EPF-14, On order

Leave a Reply