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Description
The F-4J ECC(Enhanced Combat Capability) is an upgraded F-4J flown by the Royal Nordenic Air Force.The upgrade program, initiated in 1983 and completed in 1991 in order to upgrade its F-4J fleet and keep up with the performance of its advanced Soviet counterparts. The ECC Program saw improvements made to the engines,avionics, radar, and weapon systems of the baseline F-4J(ND) Tyrfing.

A total number of 74 were converted, these aircrafts served until 2011

Upgrade List
Anaheim ALA990 Head-up display
ALR-68 Radar warning receiver
Honeywell H-423 laser gyro inertial navigation system
Mil Std 1553R digital data bus
AN/APG-65N radar and AIM-120 AMRAAM capability
Astronautics Central Air Data Computer
Mil Std 1553R digital data bus
GEC-Marconi GPS/INS
New UHF and IFF packages
IAIC mission computer
Pratt & Whitney PW1120 turbofan engines with 20,585 lbf (91.56 kN / 9,337 kgf) of afterburner thrust each, giving a significant performance gain over J79 Phantoms
Armament
Air defence
4 × Skyflash or AIM-120 AMRAAM in fuselage recesses plus 4 × KDM Seax or 4 x AIM-9 Sidewinders on wing pylons
Strike
Up to 180 SNEB 68mm unguided rockets;
18× Mk.82, GBU-12
5× Mk.84, GBU-10, GBU-14
2x GBU-8 HOBOS
6× AGM-65D/G Maverick
4× AGM-88 HARM, AGM-78 Standard ARM
2x AGM-84 Harpoon
1x Hægnes Gram
MW-1 submunition system

Description
The F-4J ECC(Enhanced Combat Capability) is an upgraded F-4J flown by the Royal Nordenic Air Force.The upgrade program, initiated in 1983 and completed in 1991 in order to upgrade its F-4J fleet and keep up with the performance of its advanced Soviet counterparts. The ECC Program saw improvements made to the engines,avionics, radar, and weapon systems of the baseline F-4J(ND) Tyrfing.

A total number of 74 were converted, these aircrafts served until 2011

Upgrade List
Anaheim ALA990 Head-up display
ALR-68 Radar warning receiver
Honeywell H-423 laser gyro inertial navigation system
Mil Std 1553R digital data bus
AN/APG-65N radar and AIM-120 AMRAAM capability
Astronautics Central Air Data Computer
Mil Std 1553R digital data bus
GEC-Marconi GPS/INS
New UHF and IFF packages
IAIC mission computer
Pratt & Whitney PW1120 turbofan engines with 20,585 lbf (91.56 kN / 9,337 kgf) of afterburner thrust each, giving a significant performance gain over J79 Phantoms
Armament
Air defence
4 × Skyflash or AIM-120 AMRAAM in fuselage recesses plus 4 × KDM Seax or 4 x AIM-9 Sidewinders on wing pylons
Strike
Up to 180 SNEB 68mm unguided rockets;
18× Mk.82, GBU-12
5× Mk.84, GBU-10, GBU-14
2x GBU-8 HOBOS
6× AGM-65D/G Maverick
4× AGM-88 HARM, AGM-78 Standard ARM
2x AGM-84 Harpoon
1x Hægnes Gram
MW-1 submunition system