
Navy aviation 2020 vision
The past three years have been troubling times for the Royal Australian Navy's aviation arm with the failure of the Sea 1411 project to deliver the Kaman SH-2G(A) 'Super Seasprite' and the loss of 'Shark 02', a Westland 'Sea King' Mk 50 on Nias Island in 2005.
But despite these high profile failures Naval Aviation has also maintained an operational combat helicopter capability in the Iraqi waters of the Persian Gulf or North Arabian Gulf (NAG) since 2003. The Sikorsky S-70B-2 'Seahawk' flight attached to RAN frigates patrolling the NAG remain one of the few Australian Defence Force (ADF) aircraft constantly and consistently deployed in the face of a threat and tasked to actively defeat this threat. As a single point of failure, a lone aircraft on a small ship, the challenge of maintaining a 24-7 aviation capability (including an all weather flight deck) with only five aircrew and 10 technicians cannot be overstated.
Recognition of these successes and failures has been critical in the RAN's development of a new blueprint for its future aviation requirements – the navy aviation 2020 (NA 2020) document. That blueprint does not override other inputs into the future shape of naval aviation, such as the capability development process and the new white paper. But the RAN expects that it will provide the guiding principles for all elements of Defence to use when considering the future of naval aviation as a whole.
NA 2020 has been designed to take into account the complex legacies such as workforce retention, Sea 1411 and the operation of naval aviation flights and combine that with the expected future shape of the fleet and other established Defence objectives such as rotary wing rationalization under Air 9000.
NA 2020 maps out an objective future naval aviation combat system (FNACS) by 2020, based on up to 36 common, multi-role configurable helicopters being acquired under Air 9000 Phase 8, the joint Air 9000 Phase 7 Helicopter Aircrew Training System (HATS) in conjunction with army, and a single type of unmanned aerial system (UAS) managed by naval aviation to expand and extend the influence of the fleet.
SEASPRITE GAP FILLER
The acquisition timetable of the FNACS and a navy UAS remain dependent upon the new white paper process, especially the UAS which hasn't yet been scoped by Defence's capability development group. The immediate need for FNACS is high with the cancellation of the 11 Seasprites leaving only 16 Seahawks to provide up to nine shipboard flights.
With the Seahawk undergoing their Sea 1405 Phase 3B forward looking infra red (FLIR) and electronic support measures (ESM) upgrade, scheduled to finish in December 2009, availability has been lower than normal. The re-scoping of Sea 9000 Phase 3 for a Seahawk mid life upgrade (MLU) into two phases of Seahawk capability assurance (SCAP1 & 2) has removed some of the potential availability burden on the Seahawk.
Rather than an extensive airframe and systems rebuild SCAP1 will just address replacement of discontinued sub-systems with no capability enhancement up to 2010/11 and SCAP2 will address other obsolescence issues up to planned withdrawal date for the type.
While the overall scope of SCAP continues to be developed, elements are expected to include replacing obsolete radars and acoustics processors by 2012/13. Both SCAPs are to be managed with minimum possible risk to maximise the number of potential shipboard flights.
Despite Seahawk availability issues and the shortfall in naval aviation combat systems the RAN will not ask for a Seasprite gap filler capability until FNACS is available. Instead the retention and motivation initiative (RMI) adopted after the Seasprite had its airworthiness certification withdrawn will be extended and expanded to otherwise occupy surplus navy aircrew.
Currently the RMI includes 723 Squadron's 'Power' Flight of three AgustaWestland AW109s leased through Raytheon Australia to provide additional flying hours in a more complex aircraft other than the pedestrian Eurocopter EC350 'Squirrel' and service exchanges. In addition there are currently seven RAN aviators on threeyear tours with the United States Coast Guard (USCG) flying naval standard helicopters on operational over-water search and rescue (SAR) and law enforcement missions. As the USCG exchanges finish and the number of trained RAN aircrew grow those surplus to the reduced fleet will be exported to the army and air force placing naval aviation in a unique position in the ADF as a workforce exporter. These out of naval aviation postings will however be temporary as FNACS comes online the aircrew will be returned by mid decade to the Navy.
THE 'F-NACKS' HELICOPTER
Planning for the replacement of the Seahawk and filling the Seasprite gap is however moving quickly. The FNACS requirement is currently programmed for first pass in late 2009 and in-service delivery in the mid 2010s.
Air 9000 Phase 8 was renamed in the 2008-09 Federal Budget to recognise its centrality to the FNACS requirement and evolution of the requirement. But Phase 8 is no longer just a Seahawk and Seasprite replacement but will also include commonality with the maritime support helicopter (MSH) role currently fulfilled by the Sea King being replaced by six Eurocopter MRH90s. Those aircraft will achieve initial operating capability (IOC) from July 2010.
The new FNACS helicopter will be limited to a military off the shelf (MOTS) acquisition with capability development group adamant there will be no orphan helicopter acquired. The mission system will be open architecture and a long term collaborative development strategy with industry and other users is planned to enable spiral upgrades and cost effective sustainment.
The FNACS helicopter will be capable of rapid reconfiguration for Anti-Submarine Warfare (ASW); close Anti-Surface Warfare (ASuW) with weapons like the FN Herstal M3M 12.7mm machinegun acquired under Navy minors for the Seahawk and the Lockheed Martin AGM-114 'Hellfire' missile; standoff ASuW with the Kongsberg 'Penguin' Mk 2 Mod 7 missile acquired for the Seasprite under Sea 1414 and fleet logistics support. The single type of helicopter is expected to permit role specific deployment and even at sea reconfiguration for particular missions with common support, airworthiness and workforce management.
The new Defence force structure review (FSR), being prepared as part of the current white paper process, will determine the final size of the future fleet, and everything is up for review. The existing defence capability plan (DCP) indicates by 2020 that the RAN will include three Hobart class destroyers, eight ANZAC class frigates, two Canberra class LHDs and two new AORs to replace HMA Ships Success and Sirius. To sustain each of these aviation capable ships with a naval aviation capability, not including those in periodic refit, a total of 12 shipboard flights are needed. The historical rule of thumb is another two helicopters are needed ashore to sustain each at sea requiring a total naval aviation force of 36 helicopters. That said, the nature of Defence's contemporary tendering process is to allow contenders to offer less helicopters if they can show how the system will meet the at sea requirement.
The primary candidates for Air 9000 Phase 8 are the Eurocopter NH90 NFH [NATO Frigate Helicopter] and Sikorsky's MH-60R Seahawk. The NH90 NFH will have an advantage in the role configuration for logistics support as all interior systems boxes and crew seats (up to two sensor/tactical operators) can be removed providing a similar flexible load capability with side doors and rear ramp to the MRH90 MSH. Conversely the MH-60R's combat system has proven capabilities in ASW, close and standoff ASuW and closely matches the FNACS requirement. The current scope of Phase 8 is for enough helicopters to support nine flights – meaning around 24-30 aircraft - with the balance comprising the currently contracted MRH90 MSH capability. Depending on the winner of Air 9000 Phase 8, the on order MRH90s will either be modified to FNACS standard or replaced to ensure the common helicopter across the fleet.
UNMANNING THE NAVY
While the army and air force have struggled over the past decade to acquire in-service UAS through long and muddled acquisition programs, JP 129 and JP 2062 (now Air 7000 Phase 1), navy aviation has decided that this form of capability is inevitable and offer considerable opportunity to enhance capability and overcome some of difficulties of providing aerial surveillance and response to the fleet. NA 2020 specifies that the FNACS will include a UAS capability to augment manned helicopters and provide relief to the single point of failure inherent to single air vehicle shipboard flights.
Funding issues within the DCP for Air 9000 Phase 8 mean that the UAS can't be acquired in the same project without reconsideration by Government. Capability development group expects the UAS will be acquired under its own project or phase especially considering the breadth of potential scope for the solution. NA 2020 outlines that the UAS needs to be managed by naval aviation at sea to best deliver the effect. This leaves an enormous amount of leeway to define the solution. Further complicating the issue is the space limitations of the Hobart and ANZAC ships, both of which have only single hangars sized for a 10 tonne class helicopter. There is potentially additional space for hangar expansion (but not enough for doubling) on both ships but this would require redesign and in the case of the ANZACs rebuilding.
That means that the most likely ship based UAS solution, the Northrop Grumman MQ-8B 'Fire Scout' - which is the only VTOL UAS currently moving into production for standardized ship based operations - could only be fielded from the current planned destroyer and frigate fleet in place of the FNACS helicopter. This same dilemma also faces the only likely future Fire Scout competitor - the Boeing A160T 'Hummingbird' aircraft which uses a unique variable speed rotor to provide extremely long endurance. While each FNACS helicopter could be replaced by three Fire Scouts or two Hummingbirds, such an option is unlikely considering the requirement for ASW and fleet logistics.
Smaller UAVs like the Boeing/Insitu 'Scan Eagle' and its more capable slightly larger cousin the Insitu 'Integrator' require minimal space and don’t even need to use the flight deck; being catapulted off and hooked back onto the ship. However Scan Eagle UAVs cannot currently carry the kind of typical naval warfare sensors like long range FLIRs and maritime search radars or weapons options. That capability may be possible via the Integrator aircraft however. That said the 'Scan Eagle' family is being increasingly deployed about US navy warships, including FFG 7 class ships as operated by the RAN. Likewise the USN is planning wide scale deployment of tactical class systems in the size and capability footprint of the Scan Eagle under its planned Tier II acquisition programme, draft tenders for which were released in early June with formal competition launch in the final quarter of this calendar year.
Another alternative solution may be smaller scale VTOL UAS such as the Schiebel S-100. That type is only 3m long and 1m high and could be stored alongside the FNACS helicopter. The S-100 also provides high sustained speeds similar to manned helicopters and enough payload for conventional sensors. The only problem is almost insurmountable: The S-100’s 40 kW (5 hp) Diamond Engines IAE 50R rotary engine runs on high octane Avgas that is virtually prohibited from storage onboard naval vessels due to its fire risk. Increasingly this military aversion to high flashpoint fuels is being met by small compact heavy fuel engines (HFE) using military standard kerosene jet fuel (JP-5) are being fitted to unmanned aircraft. If the S-100 was to be modified with a HFE, it could be a fleet compatible option. S-100 is expected to be offered for the USN Tier II competition, with the outcome of that programme as a whole expected to play a major role in shaping corresponding Australian thinking.
MALES IN THE FLEET
The other alternative to basing mission capable and fleet compatible UAS on destroyers and frigates in place of manned helicopters is by basing the UAS on another task group vessel like the new LHDs. Using the LHD as a mother ship to a fleet of UAS would take up a minor proportion of its hangar space, but with the caveat that only ships as part of an LHD equipped task group could gain the benefit of such a capability. Using VTOL UAS would enable them to source refuelling from the destroyers and frigates to provide an extended tactical presence away from the LHD.
Alternatively a larger naval UAS could be based ashore, with these enabling large fixed wing systems in the medium altitude long endurance (MALE) category to be considered in the force mix evaluation process. Aircraft in this class include the General Atomics Aeronautical Systems Predator B, the developmental Elbit Systems Hermes 900, and the fielded IAI Malat Heron - one of which was used in May 2008 for Customs UAS operations testing over the Gulf of Carpentaria.
MALE systems are typically capable of loitering for over 24 hours at reasonable distances (multiple 100kms) from main operating bases while carrying complete sensors payloads (FLIR, maritime search radar and ESM) and weapons. The Predator B can carry large sensors including the Elta EL/M-2022U radar, capable of detecting very small objects and provide range signature and inverse synthetic aperture radarbased automatic classification. Predator B can also carry significant weapons loads including Hellfire, Raytheon GBU-12 'Paveway II' laser guided bombs (LGB), Boeing GBU-38 JDAMs [Joint Direct Attack Munition] and Raytheon AIM-9X 'Sidewinder' air to air missiles. Potentially aircraft in this class would also be able to deploy standoff anti-ship missiles like the Penguin and light weight torpedoes for ASW.
An overhead MALE UAS would provide far more sensor and weapons options compared to ship based VTOL or catapult launched alternatives. The challenge would be to develop a shore based strategy while ensuring availability to the fleet. For example it is unrealistic to expect a shore based navy UAS could provide air support to a naval vessel operating around the Heard and McDonald Islands deep in the Southern Ocean, 5,000 km from Australia.
However in most likely conflict scenarios are littoral operations near or around coastlines. For example current operations in the NAG could be supported by MALE UAVs operating out of Al Adied Air Base in Qatar could easily sustain 12-24hr overhead loiters depending on the level of weaponry carried. On the balance side shore basing could contribute to achieving some of Navy's personnel retention goals under the 'sea change' program.
MALE and VTOL UAS solutions are however far more expensive than a Scan Eagle or even a hand launched mini UAS. But the cost involved reflects the higher levels of capability on offer: a MALE system could provide a significant sensor reach improvement in tough at-sea operating environments and the capability to supplant the shipboard flight’s single unit naval helicopter while it may be unavailable.
In turn the cost of more capable UAS reflects the ongoing challenge facing the realisation of the Navy's objective through NA 2020: Budgetary pressures may leave the objective force without the kind of capability enhancement potential a naval UAS offers.


