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CSP 1100(C), Operating Instructions for ECM Mark 2 (CSP 888/889) and CCM Mark 1 (CSP 1600) describes the high level United States cipher machine of WW II. More background on this machine and an Army manual may be found at:
http://www.maritime.org/tech/ecm2.htm

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CSP 1100(C), Operating Instructions for ECM Mark 2 (CSP 888/889) and CCM Mark 1 (CSP 1600), CONFIDENTIAL, -1-

Declassified, Authority NND 003 004, By RT,


CONFIDENTIAL CSP 1100(C)

NAVY DEPARTMENT

OFFICE OF CHIEF OF NAVAL OPERATIONS

WASHINGTON

16 MAY 1944

ECM OPERATING INSTRUCTIONS

1. CSP 1100(C) is effective upon receipt.

2. CSP's 888, 889, and 1600 and associated publications shall not be used until the instructions contained herein have been read and thoroughly understood.

3. This publication is distributed to actual and potential holders of CSP's 888, 889, 1600 and associated publications.

4. CSP 1100(C) is a CONFIDENTIAL registered publication and shall be handled, stowed, transported and accounted for in accordance with the current edition of the Registered Publication Manual (RPS-4). This publication shall be destroyed by burning thirty (30) days after the end of its effective period. It shall not be carried in aircraft for use therein.

5. The use of this publication by enlisted members of Coding Boards, and by the authorized ECM repair personnel of ECM Repair Facilities is authorized. In such cases, the publication is to remain in the potential custody of a commissioned officer.

THIS PUBLICATION CONSISTS OF
SEVENTY-SIX (76) PAGES

Joseph R. Redman, Rear Admiral, USN, Director of Naval Communications

 
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ARMY-NAVY JOINT POLICY CONCERNING DISTRIBUTION
AND DISCLOSURE OF CRYPTOGRAPHIC
DESIGN OF THE ECM-M134C

On June 26, 1942 the Army and Navy jointly agreed on the following policy:

"It is mutually agreed that the ECM-M134C will not be placed ashore in foreign territory except at such places where armed personnel of U.S. forces are stationed in sufficient numbers to properly safeguard the physical security of the machine.

"The Army or Navy may make the machine available to the Allies of the United States if the machine is accompanied by a Liaison Officer and Communication Group. It will be the duty of the Liaison Officer to prevent the viewing of the machine or its operation or associated equipment by other than authorized personnel of U.S. armed forces.

"The U.S. Army and Navy mutually agree that they will regard as secret information to be divulged only to the armed forces of the U.S. or to any U.S. citizen required to possess this information in the interests of the United States, any details concerning the ECM-M134C including rotors, wiring diagrams, keys, keying instructions and operating instructions.

"If at any time either the Army or the Navy considers it necessary to deviate in any way from this policy, the one shall fully inform the other of the facts and circumstances and the change in policy, if any, shall be by joint agreement."

STRICT COMPLIANCE WITH THIS POLICY IS DIRECTED.

 
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BLANK

 
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TABLE OF CONTENTS

PART I - GENERAL
101-Location7
102-Type 8 Safe Locker7
103-Army Type Field Safe CH-768
104-Uncrating and Crating8
105-Shipping Damage9
106-Inspection9
107-Accounting9
108-Stowage of Classified Publications10
109-Transportation10
110-Compromise10
111-Destruction11
112-Order of Destruction11
113-Code Wheels, Destruction11
114-Key Lists, Destruction11
115-Machines, Destruction12
116-Demolition Charges and Incendiary Bombs12
117-Incendiary Bombs13
118-Return of Superseded Code Wheels14
119-Reports of Casualties and Defects14
120-Stream-lined Instructions15
121-Criticism of ECM Publications15

 
PART II - DESCRIPTION

201-General16
202-Code Wheels and Index Wheels16
203-Cipher Unit (CSP 887)17
204-Code Wheel Stepping Assembly18
205-Keyboard18
206-Printer18
207-Zeroizer19
208-Controller19
209-Electric Motor20
210-Main Shaft20
211-Emergency Hand Drive22
212-Automatic Word Spacer23
213-Counter23
214-Spark Suppressors23
215-Input and Output Receptacles23

 
PART III - OPERATION

301-Requirements25
302-Preparation of Machine25
303-Key List25
304-Code Wheel Set26
305-Code Wheel Arrangement26
306-Index Wheel Setting26
307-Zeroizing27
308-26-30 Letter Check27
309-Code Wheel Alignment28
310-Heading and Indicators29
311-Encipherment29
312-Completing the Message29
313-Example30
314-Check Decipherment30
315-Decipherment30
316-Joint Army-Navy Method of Operation of the ECM-General31
317-Key Lists31
318-Definitions32
319-Encipherment32
320-Example33
321-Decipherment33
322-Parallel Operation34
323-Preparation of Machines for Parallel Operation34
324-Operating Procedure34
325-Emergency Operation35
326-Correction of Errors36
327-Garbles37
328-Special Checking Process for "Simple-Substitution"37
329-Random Selection of Code Wheel Alignments38
330-Message Length38

 
PART IV - MAINTENANCE

401-Routine Maintenance39
402-Lubrication39
403-Cleaning Contacts42
404-Code Wheel Lubricant43
405-Printer Ribbon Replacements43
406-Paper Tape Replacement44
407-Cautions45

 
PART V - REPAIR

501-General46
502-Training Schools47
503-Qualified and Authorized Repair Personnel48
504-Emergency Repairs48
505-Spare Parts Box (ENG 109)48
506-Zeroizing50
507-Code Wheels at Stepping Maze50
508-Code Wheels of Alphabet Maze50
509-Keylever Failure50
510-Motor Failure51
511-26-30 Letter Check51
512-Printing52
513-Spark Suppressors53
514-Code Wheels53
515-Motor Adjustment54
516-Clutch Magnet54
517-Rechecks Required54
518-Adjustment Specifications54
519-Stepping Checks56

 
PART VI - CCM MARK 1

601-General67
602-Code Wheels67
603-Description67
604-Stepping Control67
605-Preparation68
606-KeyList68
607-Definitions68
608-Code Wheel Arrangement69
609-26-30 Letter Check69
610-Encipherment69
611-Check Decipherment70
612-Example71
613-Message Length71
614-Decipherment71
615-Clearing Garbles71
616-Stepping Magnet Contacts72
617-Contact Adjustments72
 
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Photo of safe with both doors open, on top is an ECM on the bottom some documents.
THE TYPE 8 SAFE LOCKER
and
THE ECM MK 2

PLATE 1

 
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