LCAC Hovercraft: US Navy’s Champion Schleppers Get SLEPped

The LCAC Program and its SLEPpers

Many militaries rely on slower and less expensive LCM (Landing Craft, Mechanized) boats, LCUs, and related small landing craft. By using hovercraft, however, the US military gives itself additional options for traversing difficult terrain like marshes, broadens its potential landing zones, and buys fast ferry services that can build up a landing zone more quickly. These same traits make LCACs extremely well-suited to humanitarian missions, as shown after the South Asian tsunami and in the wake of Hurricane Katrina.

Contracts for 91 LCACs were approved through FY 1997, with 91 craft delivered to the Fleet by the end of 2000. Of the LCACs in service, the US military’s EXWAR.ORG reports that 7 have reportedly been disassembled for FGE, 10 are in deep Reduced Operation Status (ROS), 2 are held for R&D, and 36 are in use on each coast.

LCAC SLEP extends the expected service life of the LCAC by 50%, from 20 years to 30 years. The program began in late 2000, and includes two sub-programs:

The “C4N” (Command, Control, Communications, Computers, and Navigation) sub-program replaces the LN-66 radars with modern, high-power P-80 radar systems. The SLEP will also include open-architecture electronics relying on modern commercial-off-the-shelf (COTS) equipment, which allows much easier incorporation of precision navigation systems, new communications systems, et. al. LED screens and LED keyboards use less power than the old Cathode Ray Tubes and the bulb-type indicators, and generate less heat. When coupled with the air-conditioning that has been added to the LCAC command modules, the hovercraft’s crew and electronics are given a better environment.

Other improvements are more “hardware-oriented,” and include:

• Engine upgrades to ETF-40B configuration that will provide additional power and lift (especially in environments over 100 degrees), reduced fuel consumption, reduced maintenance needs, and reduced lift footprint.

• Replacement of the LCACs’ “buoyancy box” to solve corrosion problems, incorporate hull improvements, and extend their fatigue-limits.

• A new deep hovercraft skirt to reduce drag, increase the performance envelope over water and land, and reduce maintenance requirements.

LCAC-related Contracts, 2005 – Present

November 19/18: Engines Rolls Royce is being contracted to support the US Navy’s Ship-to-Shore Connector program. The company is being awarded with a firm-fixed-price modification worth $41 million. The contract provides for the procurement of 20 MT7 marine turbine engines used to power Landing Craft, Air Cushion (LCAC) 100-class craft 109 through 113. The program seeks to replace existing Navy landing hovercraft with the LCAC 100 due to current craft nearing the end of their service life. Each LCAC 100 craft mounts four MT7 engines. The MT7 combines modern turbine materials and technology to provide a state-of-the-art power system suited to a range of naval applications such as main propulsion and power generation. Work to be performed includes production of the MT7 engines and delivery to Textron Marine Systems for the assembly of the LCAC 100 class craft. Work will be performed in Indianapolis, Indiana, and is expected to be completed by January, 2020.

September 13/18: SLEPing away  The US Navy is awarding Tecnico Corp with a contract in support of the Landing Craft, Air Cushion service life extension program (LCAC SLEP). The firm-fixed-price contract has a value of $25.6 million and provides for three LCAC SLEP availabilities. The company will be responsible to repair and upgrade the LCAC’s buoyancy box, replace its gas turbine engine and will install a new skirt and an integrated command, control, computers, communications and navigation equipment package. The Landing Craft Air Cushion is a high-speed, over-the-beach fully amphibious air cushion landing craft capable of carrying a 75 ton maximum payload and operating from existing and planned well deck ships. The craft is used to transport weapons systems, equipment, cargo and personnel from ship to shore and across the beach. The LCAC SLEP will extend the service life of the platform from 20 to 30 years. Work will be performed in Little Creek, Virginia, and is expected to be completed by February 2021.

FY 2014

Oct 2/14: WinXP bites. The LCAC fleet is the latest platform to be bitten by Microsoft’s decision to end support for Windows XP. The Navy completes the Critical Design Review for a new Command, Control, Communications, Computers & Navigation (C4N) suite, “System Baseline Configuration 4”:

“In order to address software obsolescence in the C4N suite, the LCAC Software Support Activity is transitioning from embedded Windows XP to Windows 7 for the Windows-based nodes of the system. The C4N software re-host from SBC3 to SBC4 is also leveraging off of newer [Modular Open Scalable Approach USN specifications] technology in order to reduce the required number of processing units to support the new modular, open-scalable architecture approach.”

This approach seems to create the same problem down the road, but at least they weren’t crazy enough to use Windows 8. The hardware shifts are actually the bigger benefit, lowering volume, weight and power requirements. It also switches the hardware from front I/O connectors to swappable and testable line replaceable unit boxes. That should cut maintenance time nicely.

The LCAC C4N suite provides the 3-person crew with 6 sunlight readable, Night Vision Device compatible LCD displays in the Command Module. Feeds include 4 sensor interface units that provide the signal conditioning and conversion for 190 different sensors and alarms. The navigation system integrates with a 25 kW surface search radar, a primary and secondary GPS system, and an inertial navigation system. A common data recorder is used to transfer mission plans, while recording of real-time navigation, audio, and engineering data/actions. Beyond the screens, a fly-by-wire control system with 2 fully redundant engineering control system processing units is used to pilot the craft. The Navy calls them pilots, because LCACs “fly” on a cushion of air. Sources: NAVSEA, “New LCAC C4N Suite Completes Critical Design Review”.

Sept 26/13: +2 SLEP. L-3 Unidyne, Inc., Norfolk, VA, is being awarded a $13.7 million firm-fixed-priced contract for 2 LCAC Service Life Extension Program craft in FY 2013. All funds are committed immediately.

This contract was competitively procured via FBO.gov, with 1 offer received by US NAVSEA in Washington, DC. No contract number was given, but it’s likely to be part of N00024-12-C-2402.

April 1/13: Engines. Vericor Power Systems LLC in Alpharetta, GA receives a $12.1 million contract modification for the manufacture, testing and delivery of 8 LCAC ETF40B Marine gas turbine engines as well as the repair/refurbishment of 8 output group modules for LCAC engines. Each LCAC uses 4 turbines, so this will provide for another 2 overhauled LCACs. That makes 8 hovercraft worth since the February 2012 award that specified 8 SLEPped LCACs. Guess funds are a bit tight with everything going on in Washington.

Work will be performed in Alpharetta, GA (90%), and Winnipeg, Manitoba, Canada (10%), and is expected to be completed by February 2014. All funds are committed immediately. US Naval Sea Systems Command in Washington, DC manages the contracts (N00024-12-C-4154).

April 1/13: Engines. Vericor Power Systems LLC in Alpharetta, GA receives a $12.1 million contract modification for the manufacture, testing and delivery of 8 LCAC ETF40B Marine gas turbine engines as well as the repair/refurbishment of 8 output group modules for LCAC engines. Each LCAC uses 4 turbines, so this will provide for 2 overhauled LCACs.

Work will be performed in Alpharetta, GA (90%), and Winnipeg, Manitoba, Canada (10%), and is expected to be completed by February 2014. All funds are committed immediately, using FY 2013 Shipbuilding and Conversion budgets. US Naval Sea Systems Command in Washington, DC manages the contracts (N00024-12-C-4154).

May 7/12: Engines. Vericor Power Systems, LLC in Alpharetta, GA receives a $23.6 million firm-fixed-price contract for the manufacture, testing, and delivery of 16 ETF40B marine gas turbine engines in support of the LCAC SLEP program, and the repair/refurbishment of 16 output group modules for LCAC engines. That would cover 4 LCACs.

This contract includes options, which could bring its cumulative value to $60.7 million. Work will be performed in Winnipeg, Manitoba, Canada, and is expected to complete by June 2013 (N00024-12-C-4154).

Feb 27/12: +8 SLEP. L-3 Unidyne, Inc. in Norfolk, VA receives a pair of contracts worth $68.2 million, to SLEP a total of 8 LCACs – 4 on each coast. This brings the number of announced LCAC SLEP orders to 30 hovercraft between April 2005 and the present.

Contract #1 is a $31.4 million modification to SLEP 4 of Assault Craft Unit Four’s hovercraft in Virginia Beach, VA, and is expected to complete by February 2014 (N00024-12-C-2402).

Contract #2 a $26.8 million modification to SLEP 4 of Assault Craft Unit Five’s hovercraft in Camp Pendleton, CA, and is expected to be completed by February 2014 (N00024-12-C-2403).

Sept 26/11: Support. GE Aviation Systems, LLC’s Dowty Propellers in Sterling, VA receives a not-to-exceed $6.7 million unfinalized contractual action against an existing basic ordering agreement to repair marine propellers used aboard LCAC vessels. Work will be performed in Sterling VA (85%), and in the United Kingdom (15%), and is expected to be complete by February 2014.

One company was solicited for the non-competitive requirement, and 1 offer was received. $3.35 million is committed. NAVSUP Weapons System Support in Mechanicsburg, PA manages the contract (N00104-11-G-A004).

Jan 20/11: Engines. Vericor Power Systems LLC announces a firm fixed-price contract for up to 34 of its ETF40B marine gas turbine engines, and overhaul of related hardware for the US Navy’s FY 2010/2011 LCAC Service Life Extension Program (SLEP). This would cover 8 LCACs, plus 2 spares.

The firm adds that they will be offering their TF60B for the US Navy’s new Ship-to-Shore Connector LCAC replacement program. The new engine is based on the TF40/ETF40B, but adds improvements. For instance, its power-producer is mounted to a heavy duty marine inlet module on the craft, which aims to eliminate major alignment and maintenance problems on the LCAC. The TF60B engine test schedule continues, with performance testing slated for spring 2011 at Naval Air Station Patuxent River, MD.

Nov 15/10: Engines. Vericor Power Systems, LLC in Alpharetta, GA receives a $16.7 million firm-fixed-price contract for 12 of the LCAC’s ETF40B marine gas turbine engines. Work will be performed in Winnipeg, Canada, and is expected to be complete by July 2012. This contract was not competitively procured by US Naval Sea Systems Command in Washington, DC (N00024-11-C-4113).

Nov 4/10: Support. L-3 Services, Inc.’s Unidyne Division in Norfolk, VA wins a $473,469 contract for LCAC 55 Continuous Maintenance Availability (CMAV), including miscellaneous electrical, mechanical, and structural repairs. Work will be performed at a government facility.

It is a good illustration of the fact that the LCAC fleet is also maintained and overhauled using a number of smaller contracts which do not reach DefenseLINK’s $5 million announcement threshold. An Oct 27/10 solicitation for LCAC 51 is similar, but is a small-business set aside. US FedBizOpps.

Sept 29/10: +3 SLEP. L-3 Services, Inc.’s Unidyne Division in Norfolk, VA wins a $14.5 million firm-fixed-price contract for service life extension program on LCACs 63, 72 and 74. This contract includes provisions for over and above work, which could bring its cumulative value to $17.5 million. Work will be performed in Camp Pendleton, CA, and is expected to be complete by August 2012. This contract was competitively procured via the Federal Business Opportunities website, with 5 proposals solicited and 2 offers received. The Southwest Regional Maintenance Center in San Diego, CA manages this contract (N55236-10-C-0012).

Aug 11/09: +3 SLEP. Oceaneering International, Inc.’s Marine Services Division in Chesapeake, VA receives a $13.6 million contract modification to extend the service life of 3 LCACs via repair and upgrade of the buoyancy box, gas turbine engine replacement, installation of a new skirt, installation of an integrated C4N equipment package, craft alterations, and repair work.

Work will be performed in Norfolk, VA, and is expected to complete it by August 2012. The Naval Sea Systems Command in Washington Navy Yard, Washington, DC manages the contract (N00024-09-C-2240).

May 26/09: +3 SLEP. Oceaneering International’s Marine Services Division in Chesapeake, VA won a $14 million firm-fixed-price contract to extend the service life of 3 LCACs via repair and upgrade of the buoyancy box, gas turbine engine replacement, installation of a new skirt, installation of an integrated C4N equipment package, craft alterations, and repair work. This contract includes options which would bring its cumulative value to $38.9 million.

Oceaneering will perform the work in Norfolk, VA and expects to complete it by November 2012. This contract was competitively procured via FedBizOpps.com, with 4 offers received by the Naval Sea Systems Command at the Washington Navy Yard in Washington, DC (N00024-09-C-2240).

April 20/09: Engines. Vericor Power Systems, LLC, in Alpharetta, GA received a $32.1 million firm-fixed-price modification to a previously awarded contract, exercising an option to build, test, and deliver 24 ETF40B marine gas turbine engines for the FY 2009 LCAC SLEP program. That would equip 6 LCACS. Work will be performed in Winnipeg, Manitoba, Canada, and is expected to be complete by August 2010. The US Naval Sea Systems Command (NVSEA) in Washington, DC issued the contract (N00024-08-C-4117).

Oct 2/08: Support. Gryphon Technologies LC in Greenbelt, MD received a $17.2 million cost-plus fixed fee contract on Sept 30/08, for the procurement of Expeditionary Warfare Program and LCAC maintenance, modification, repair, and trial support engineering support services. The contractor will provide all personnel, materials, equipment, services for the engineering, & technical support required to provide logistics and material support for the LCAC Program.

Work will be performed in Panama City, FL, and is expected to be complete by October 2013. Contract funds in the amount of $300,000 expired at the end of FY 2008, on Sept 30th. This contract was competitively procured and advertised via Navy Electronic Commerce On-line and Federal Business Opportunities website, with one offer received by the Naval Surface Warfare Center Panama City Division in Panama City, FL (N61331-08-D-0021).

Aug 27/08: Engines. Vericor Power Systems, LLC in Alpharetta, GA received a $20.5 million firm-fixed-price contract to build, test, and deliver 16 ETF40B marine gas turbine engines for the FY 2008 LCAC Service Life Extension Program (SLEP), which would cover 4 LCACs. This contract includes options which, if exercised, would bring the cumulative value of this contract to $57.8 million.

Work will be performed in Winnipeg, Manitoba, Canada, and is expected to be complete by October 2009. This contract was not competitively procured, but the solicitation was posted on the Federal Business Opportunities website by the Naval Sea Systems Command in Washington Navy Yard, DC (N00024-08-C-4117).

April 2/07: +3 SLEP. L-3 Communications Titan Corporation’s Unidyne Division in Norfolk, VA received a $22.9 million modification to under previously awarded contract to exercise options for preparation and accomplishment of the FY 2007 Service Life Extension Program (SLEP) availabilities of landing craft air cushions (LCAC) 36, LCAC 50, and LCAC 69, at assault craft unit 4.

Work will be performed in Norfolk, VA and is expected to be complete March 2009. The Naval Sea Systems Command in Washington, DC issued the contract (N00024-06-C-2203).

March 30/07: +3 SLEP. L-3 Communications Titan Corp’s Unidyne Division in Norfolk, VA received a $22.9 million modification to a previously awarded contract, exercising options for preparation and accomplishment of the FY 2007 Service Life Extension Program (SLEP) availabilities of LCAC 36, LCAC 50, and LCAC 69, at assault craft unit 4.

Work will be performed in Norfolk, VA and is expected to be complete in March 2009. The Naval Sea Systems Command in Washington, DC manages the contract (N00024-06-C-2203).

Feb 20/07: Engines. Vericor Power Systems, LLC in Alpharetta, GA received a $29.6 million firm-fixed-price delivery order to previously awarded contract for the manufacture, testing and delivery of 24 ETF40B marine gas turbine engines, which would equip 6 LCACs. This covers LCAC SLEP requirements for FY 2007.

Work will be performed at Standard Aero Energy in Winnipeg, Canada under a 2005 partnership agreement, and is expected to be complete by November 2008. Contract funds will not expire at the end of the current fiscal year. The Naval Sea Systems Command in Washington, DC issued the contract (N00024-06-D-4107).

Oct 18/06: The LCAC community holds its annual Fleet Support Conference at Camp Pendleton, CA. Assault Craft Units (ACU) 4 and 5, as well as representatives from Washington, D.C., Little Creek, VA, and Boston Planning Yard discussed maintenance and upgrades, mission planning factors and manning issues, including the training pipeline and detailing. Chief Operations Specialist (SW/AW) David L. Lessenberry:

“During this conference, we look at all the major issues with the functions and operation of LCACs… This year we’re talking about funding, man hours and maintenance because we want to extend [the LCAC’s] service life. The LCACs have a service life of 20 years, but we can extend that by 10 years with maintenance and upgrades.”

Aug 21/06: +2 SLEP. L-3 Communications Titan Corporation’s Unidyne Division in Norfolk, VA received a $16.7 million firm-fixed-price contract for the SLEP of LCACs #29 and #32. The LCAC provides heavy lift capability to perform amphibious assaults and operational maneuvers from the sea. This contract includes options for SLEPping LCACs # 31, 48, and 33 as well, which would bring the cumulative value of this contract to 5 craft and $40 million if exercised.

Work will be performed at Assault Craft Unit Five in Camp Pendleton, CA and is expected to be complete by August 2008. This contract was competitively procured via the Federal Business Opportunities website with 29 proposals solicited and two offers received. The Southwest Regional Maintenance Center in San Diego, CA issued the contract (N55236-06-C-0001).

Mar 16/06: Engines. Vericor Power Systems, LLC in Alpharetta, GA received a $28.4 million firm-fixed-price contract for the manufacture, testing and delivery of 20 ETF40B marine gas turbine engines and 4 Pack-Up Kit spare engines for the Landing Craft-Air Cushion Service Life Extension Program.

Work will be performed at Standard Aero Energy in Winnipeg, Canada under a 2005 partnership agreement, and is expected to be complete by December 2008. The contract was not competitively procured by the Naval Sea Systems Command in Washington, DC (N00024-06-D-4107).

Nov 22/05: +3 SLEP. L-3 Communications Titan Unidyne in Norfolk, VA won an $8.8 million firm-fixed-price contract to upgrade landing craft air cushion (LCAC) hovercraft 62, 64, 65, and 76. Work will be performed in Camp Pendleton, CA and is expected to be complete by October 2006. This contract was competitively procured and advertised via the Internet, with two offers received. The Southwest Regional Maintenance Center in San Diego, CA issued the contract (N55236-06-C-0002).

April 14/05: +5 SLEP. Titan Corp.’s Unidyne Group in Norfolk, VA won a $26.4 million firm-fixed-price contract for 5 Service Life Extension Program (SLEP) Landing Craft Air Cushion (LCAC) hovercraft.

Work will be performed in Camp Pendleton, CA (80%) and Norfolk, VA (20%), and is expected to be complete by August 2007. The contact was competitively awarded and advertised via the Navy Electronic Commerce on Line website, with three offers received. The Naval Sea Systems Command, Washington, DC manages the contract.

Additional Readings

• US Navy Fact File – Landing Craft, Air Cushioned – LCAC

• Textron Marine & Land Systems – Landing Craft Air Cushion

• Global Security – Landing Craft, Air Cushion

• Vericor – TF Series Gas Turbines

Follow-on Ship to Shore Connector

• DID – Ship to Shore Connector: the USN’s New Hovercraft

Other Fast Landing Options

• Naval Technology – Zubr Class (Pomornik) Air Cushioned Landing Craft, Russia. Included as a point of comparison; the Zubr is a significantly larger craft than LCAC.

• Naval Technology – CNIM. Their L-CAT is the French EDA-R catamaran landing craft: 30m long and 12m wide, and can carry a payload of 80t at a cruise speed of 18 kts. EDA-R is a fast catamaran in transit mode, but features a central elevating deck that makes it become a flat-bottomed ship to beach, or enter an amphibious ship’s well deck.