The Hobart class consists of three air warfare destroyers being built for the Royal Australian Navy to replace aging frigates and restore destroyer capabilities. The design is based on the Navantia-designed F100 frigate and has been modified for Australian use with a 7,000 ton displacement. The Hobart class will provide air defense, destroy missiles and aircraft within 150km, and be equipped with sensors and weapons for anti-submarine and anti-ship warfare.

2. INTRODUCTION
• The Hobart class is a ship class of three air warfare destroyers (AWDs) being built for the Royal
Australian Navy (RAN).
• Planning for a class to replace the Adelaide class frigates and restore the capability last exhibited
by the Perth class destroyers began by 2000, initially under acquisition project SEA 1400, which
was re-designated SEA 4000.
• The Hobart Class air warfare destroyers (AWD) are being built by AWD Alliance for the Royal
Australian Navy (RAN).
• The air warfare destroyer program, known as SEA 4000, will deliver three advanced multirole
warships to replace the FFGs of the RAN.
• The three AWDs will be named HMAS Hobart, HMAS Brisbane and HMAS Sydney.

4. DESIGN
• The AWD platform is based on the Navantia-designed F100 frigate, which is in
service with the Spanish Navy.
• The baseline design has been slightly modified for Australian use, including the
displacement of the AWD being increased to 7,000t, and the hangar modified to
accommodate a range of helicopters.
• The range now includes powerful diesel engines combined with improved fuel
tank arrangements.
• The design also incorporates a bow thruster to provide better manoeuvrability.

6. MISSION
• The Hobart Class will provide air defence for vessels, land-based forces and
infrastructure in coastal lines.
• It will also defend and destroy missiles and aircraft within a range of 150km.
• The destroyers can also be deployed in law enforcement operations, defence aid
to the civil community, collection of environmental data, rescue operations and
diplomatic roles.
• The Hobart Class will be equipped with advanced sonar systems, decoys and
surface-launched torpedoes for anti-submarine warfare (ASW) operations.

8. COUNTERMEASURES
• The destroyer will be equipped with a ES-3701 tactical radar electronic support
measures (ESM) and surveillance system.
• In December 2008, the AWD Alliance awarded a contract for the supply of a
decoy launching system to Terma.
• Four deck-mounted MK-137 130mm decoy launchers can fire decoys to deceive
incoming anti-ship missiles.
• Other countermeasures include Nulka active missile decoy launchers and ASW
torpedo decoys.

10. PROPULSION
• The AWD will be equipped with a combined diesel and gas (CODAG)
propulsion system with two GE LM 2500 gas turbines and two diesel
engines.
• The vessel will also be fitted with a bow thruster for improved
manoeuvrability.

12. SENSORS
• The AWD's sensor suite will include AN/SPY-1D(V) phased array
radar, horizon search radar, SAM Electronics X-band navigation
radar, integrated hull-mounted and towed array sonar system, and
VAMPIR infrared search and track (IRST) system.

13. REFERENCES
• http://www.naval-technology.com/projects/hobartclassairwarfar/hobartclassairwarfar3.html
• http://www.naval-technology.com/projects/hobartclassairwarfar/images/2s-image-02.jpg
• https://www.google.co.in/search?q=hobart+class&tbm=isch&tbs=isz:lt,islt:xga&ei=lPvRU-
TvGMi2uATHtIGgAg