The nature of airborne threat to Indian Navy surface
combatants has undergone a significant change lately. At the turn of
the millennium the optimum airborne threat was exemplified by enemy
strike and Long Range Maritime Patrol/Anti-Submarine Warfare (LRMP/ASW)
platforms armed with deadly accurate anti-ship missiles like
AGM-84 Harpoon and
Exocet AM39. The situation has altered significantly during past few
years because of rampant violation of Missile Technology Control
Regime (MTCR), in respect to cruise and ballistic missile technology
in the Asian continent. These developments have necessitated the
preferable tactics of destroying the attacking missile platform well
before the missile is released to ensure a decent chance of survival
of the defending vessels. Capabilities for execution of “outer-air
battles” have assumed priority and an aircraft carrier based
Airborne Warning & Control System (AWACS) platform to fulfill the
role of the primary sensor, has become obligatory in these concepts.
Fixed-wing AWACS platforms have superior coverage of airspace and
more importantly have the ability to guide and control ship-borne
fighters towards their targets, both in air defence and strike
missions, an attribute lacking in the Airborne Early Warning (AEW)
helicopter platforms.
The most successful aircraft carrier based AWACS platform is
represented by Northrop Grumman E-2C ‘Hawkeye’, which in E-2A
variant gained operational status aboard the CVA-63 USS
Kitty Hawk.
Operating off the coast of Vietnam in autumn 1965 in support of
United States Navy (USN) F-4 Phantoms and F-8 Crusaders, they
performed an armed Combat Air Patrol (CAP) role to cover strike
elements. Subsequently Hawkeye platforms started to control strike
missions, guiding USN strike packages of F-4 Phantoms and A-6
Intruders around high ground and defensive concentrations, and
warning them of enemy interceptors in the vicinity.
However the primary role of the E-2C Hawkeye aircraft is to
operate as an all-weather
AWACS platform to the naval task force capable of area and
on-station search. From an operating altitude of 25,000 to
30,000-ft, the Hawkeye warns the naval task force of approaching air
threats and provides threat identification and positional data to
interceptors. Secondary roles include strike command and control,
surveillance, guidance of search and rescue missions including
support for anti highjack operations and as a relay to extend the
range of communications between the airborne platforms and the
Combat Information Centre (CIC) of the parent aircraft carrier.
The E-2C with the APS-120 radar made its operational debut
with “unit” VAW-123 aboard USS Saratoga bound for the
Mediterranean Sea
in September 1974. This version was first to acquire a decent
“overland” capability. Hawkeye is usually the first “unit” to leave
the aircraft carrier deck after commencement of air operations. At
on-station search mode the E-2C flies at a height of around 25,000
to 30,000-feet at a distance of 370-km from the parent carrier
initiating a constant orbit, gaining altitude steadily as the fuel
burns off. The flaps are set at 10-degrees deflection to provide the
optimum 3-degrees radar-scanning attitude. Thanks to the new Allison
T56A-427 engines, the E-2C can cruise on station for more than four
hours.
During the 1990s the then recently introduced APS-138
advanced radar processing system enabled detection, identification
and tracking both over land and sea in excess of 450-km and with
expanded computer memory was able to accomplish triangulation
automatically. Advanced passive detection enabled “silent”
recognition and classification of hostile electronic emissions at
ranges well in excess of the onboard radar. A pair of Litton L-304
computers handled data processing. Data inputs or request for
information were made either by means of an alphanumeric keyboard or
by a light-pen which is usually used to “hook” a specific USN F-14
Tomcat interceptor to a specific target by feeding relevant target
information to the interceptor weapons control system by means of a
data-link.
The developing tactical situations were presented by means of
the Hazeltine APA-172 control indicator group to the “mission
control room” located in the rear fuselage directly beneath the
radome and included the “trio” of Combat Information Centre Officer,
Air Control Officer and the Radar Operator on identical crew
stations of 10-inch diameter main radar display screens, providing
data pertaining to target tracks and 5-inch alphanumeric auxiliary
display. Independent control at each station enabled crewmembers to
select relevant information and data to be presented including
target symbols, velocity vectors, and disposition of friendly
fighter forces, surface task groups and waypoints.
Presently the radome houses the AN/APA-171 antenna supplied
by Randtron Systems. The Lockheed Martin AN/APS-145 radar is capable
of tracking more than 2,000 targets and controlling the interception
of 40 hostile targets. One radar sweep covers 6 million cubic miles.
The radar's total radiation aperture control antenna reduces
sidelobes and is sufficiently robust against Electronic Counter
Measures (ECM). Now it is capable of detecting hostile airborne
targets at ranges greater than 550-km. Even cruise missiles with
Radar Cross Section (RCS) of 1-metre square or less can be detected
at around 185-km. This serves as a critical advantage as even
hostile submarines are likely to make attack with sea-skimming
anti-ship missiles and cruise missiles, thus ASW screening becomes
analogous to air defence and the “presence” of incoming cruise
missiles often will serve as a warning of the impending attack. The
latest mission computers are equipped with an enhanced high-speed
parallel processor. The Lockheed Martin AN/UYQ-70 advanced display
system and computer peripherals provide the operators with
multi-colour displays, map overlays, zoom facilities and auxiliary
data displays.
Northrop Grumman, meanwhile expressed their eagerness to sell
six “next-generation standard” E-2C Hawkeye 2000 AWACS aircraft to
the Indian Navy which in “USN colours” made its first operational
deployment in 2003 aboard USS Nimitz in support of Operation Iraqi
Freedom. Hawkeye 2000 features a smaller and lighter Raytheon
Mission Computer Upgrade (MCU) based on open architecture commercial
off-the-shelf (COTS) technology, with increased memory and faster
processing. More importantly Co-operative Engagement Capability (CEC)
consists of processor, data distribution system and antenna and to
enable Hawkeye 2000 to perform real-time battle management, fusing
and distributing information from sources such as satellite and
ship-borne radar. Also included in the “package” are Lockheed Martin
Advanced Control Indicator Set (ACIS), Satellite Communications (SATCOM) and pristine navigation and flight control systems.
In response
to the projected sale of Hawkeye 2000, the Indian Navy would do well
to redesign the flight-deck of its 37,500-tons Indigenous Aircraft
Carrier (IAR) under construction at Cochin Shipyard Limited (CSL),
Kochi to
incorporate a Conventional Take-Off Landing (CTOL) capability with
steam catapults.
With IAR construction at an initial stage incorporation of CTOL
capability will not be a much demanding proposition considering the
dimensions of the flight deck and American assistance is perhaps
available because of emerging strategic and business equations.
Hawkeye 2000 platforms will be ideally complemented by Indian Air
Force PHALCONS. Hawkeye meanwhile remains well within its
development cycle with research proceeding on the next-generation,
E-2E Advanced Hawkeye, to be fitted with a sophisticated
next-generation solid-state, electronically steered Ultra-High
Frequency (UHF) radar, Theatre Missile Defence (TBM) capabilities,
multi-sensor integration and a Northrop Grumman Navigation Systems
tactical cockpit.
Aircraft carrier based Hawkeye 2000 will prove to be
invaluable in enabling Indian Navy MiG-29K/KUBs to establish local
air superiority in open oceans even within the range of enemy
fighter and strike aircraft and will be instrumental in intercepting
and destroying enemy strike and Long Range Maritime
Patrol/Anti-Submarine Warfare (LRMP/ASW) platforms at great
distances effectively debarring them from conducting LRMP/ASW and
anti-shipping operations and engaging incoming cruise missiles. For
interception of cruise missiles a possible further development of
the MiG-29KUB platform with even more powerful radar, preferably an
Active Electronically Scanned Array (AESA) type, alongside encrypted
TKS-2/R-098 Intra-Flight Data Link (IFDL) will permit networking of
multiple MiG-29KUB platforms effectively providing additional
Airborne Early Warning (AEW) coverage of respective sectors
alongside vectoring appropriate fighters in pursuit. Exercising a
significant proportion of MiG-29KUB option will also enhance
operational capabilities in sphere of electronic warfare and
long-range interdiction. MiG-29K/KUB flight and navigation system
built on an open architecture principle around MIL-STD-1553B
standard Databus will enable integration of diverse weapons and
sensors conceptually including “outer-air battles” specific types
like the 150-km range European MBDA Meteor Beyond Visual Range
Air-to-Air Missile (BVRAAM) alongside the “monster” Indo-Russian
R-172.
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