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.
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