has a multipurpose role. The first letter(s) identify its mission. A number after the hyphen specifies the design number of the aircraft. A letter other than A (A being the original design) after the design number shows a change in the original design. For example, in F/A-18E, the F means  fighter  and  A  means  attack  aircraft.  Its  design number  is  18,  and  it  has  been  modified  four  times, represented   by   the   E   (fifth   letter   of   the   alphabet). Another example is the A-6A. When it is modified to perform  early-warning  missions,  it  then  becomes  the EA-6B   Prowler   because   of   the   special   electronic installation required for such missions. If   both   the   special-use   letter   and   the   modified mission letter apply to the same aircraft, the special-use letter  comes  first.  For  example,  YEP-3E  refers  to  a prototype  (Y),  early  warning  (E),  patrol  aircraft  (P), design number 3, and the design has been modified four times. Table 2-1 gives the basic mission, design number, manufacturer, and popular name of most naval aircraft. 2-18 BASIC MISSION AND DESIGN NUMBER CONTRACTOR/ MANUFACTURER POPULAR NAME AV-8 McDonnell-Douglas Harrier C-2 Grumman Greyhound C-9 McDonnell-Douglas Skytrain II C-12 Beechcraft Kingair C-20 Gulfstream-Aerospace Gulfstream C-130 Lockheed Hercules E-2 Grumman Hawkeye E-6 Boeing Mercury EA-6 Grumman Prowler F-14 Grumman Tomcat F/A-18 McDonnell-Douglas Hornet P-3 Lockheed Orion S-3 Lockheed Viking T-2 North American Buckeye T-34 Beech Mentor T-45 McDonnell-Douglas Goshawk OV-10 North American Bronco HH-1 Bell Iroquois/Huey AH-1 Bell Corbra SH-2 Kaman Seasprite SH-3 Sikorsky Sea King CH-46 Boeing-Vertol Sea Knight H-57 Bell Jet Ranger SH-60 Sikorsky Sea Hawk RH-53 Sikorsky Sea Stallion V-22 Bell-Boeing Osprey Table 2-1.—Naval Aircraft Identification, Manufacturers and Names