EC-47

Please Visit http://www.ec47.com

for more photos of the EC-47

I wish to thank JC Wheeler for his continuing exploration of this topic!

(The photos below are from the above web site and the drawings are made by myself)

(The photos below have been added to enhance the understanding of the drawings)

Project Phyllis Ann

MSgt Bruce F Nelson

Enlisted History Research Project

ARDF in SEA (EC-47)

CHECO Report

 

Contemporary Historical Evaluation

of Combat Operations REPORT

The EC-47 In Southeast Asia

20 September 1968

HQ PACAF

Directorate, Tactical Evaluation

CHECO Division

CHECO Report

 

Contemporary Historical Evaluation

of Combat Operations REPORT

The EC-47 In Southeast Asia

April 1968 - July 1970

12 September 1970

HQ PACAF

Directorate, Tactical Evaluation

CHECO Division

Compass Dart
Combat Cougar
Combat Cross
Commando Forge
Sentinel Eagle

X-Console ARDF

Airborne Radio Direction Finding

Y-Console

AMS

Airborne Mission Supervisor

Q-Console

Morse Intercept and Spoofing

Z-Console

VHF/UHF Intercept

*****

EC-47N with AN/ALR-34 ARDF

As can be seen here - the Navigator was given the

LOP (Line of Position) data from the X Console Operator

It was the job of the Navigator to determine the best "angle of attack"

or position of the aircraft to the signal and direction of travel

With the AN/ALR-34 System, all plotting and navigational work was done manually

Behind the Navigator in this photo can be seen the Y Operator

The Y Operator was an enlisted man who was the AMS (Airborne Mission Supervisor)

In front of the Y Operator was the Q1 or Z1 Console

Behind the Y Operator was the Q2 or Z2 Console

To the right of the Navigator is the X Console

This is a picture of the

X Console

Y Console

Navigator

Looking Forward

EC-47P with AN/ALR-35

EC-47P with AN/ALR-35 & Z-1 & Z-2

EC-47P AN/ALR-35 X-Console Looking Aft

EC-47P with AN/ALR-38 Mini Experimental System (Pleiku AB)

The AN/ALR-35, 38(Mini) & 38 had a Navigator Position

which had been updated to provide access to a computer

integral to the X Console

The periscope is visible in foreground to right of Navigator

Doppler Navigation was provided to the Navigator

Internal to the X Console was a "gray box" which provided the interface

between the on-board Dopler Radar System and the X Console

LOP's were automated to the extent that the line printer on the

Navigator's Console provided printing of those once the X Console

Operator "Locked On" to the signal

The MAP of the area was used by the Navigator along with the

UTM (Universal Trans Mercator) display on the read out on the box

on the lower left of the extended console as seen above (Red Lettering)

The left most box is the G-276B Demodulator

The right most box is the G-289 Tape Controller for the G-176F Recorder

The G-176 was located in the side of the cabinet facing the aisle

The top receiver is the G-175F - Tuners are 60-90MHz & 60-260MHz

The bottom receiver is the G-133F 100KHz - 30MHz