CH-47-Boeing Venol Chinook, a twin-engine, tandem-rotor transport helicopter, designed to carry a four-man crew and 3,3 combat-loaded troops,

CH-53-Sikorsky Sea Stallion, a twin-engine, smgle-roror, heavy transport helicopter with an average payload of 12,800 pounds. Carries crew of rhree and 38 combat-loaded Troops.

ClA-Cenrral Inrelligence Agency.

CID-Criminal Investigation Division.

CinCPac-Commander in Chief, Pacific.

CinCPacFlt-Commander in Chief, Pacific Fleet.

CIT-Counter Intelligence Team.

Class I. II, III, et al.-Categories of military supplies, e.g.. Class I, rations; Class II, petroleum-oil-lubricants; Class V, ammunition,

Claymore M18A1 U.S. directional antipersonnel mine.

CMC-Commandant of the Marine Corps.

CMH-Center of Military History, U. S- Army.

CNO - Chief of Naval Operations.

CO-CommandingOfficer-

COC-Combat Operations Center.

Col-Colonel.

ComdC - Command Chronology.

ComdHist-Command History.

Corn m - Communications.

CommO - Communications officer.

ComNavtbrPac - Commander, Naval Forces, Pacific.

ComNavForV- Commander, Nava! Forces, Vietnam.

ComUSMACV-Commander, U.S. Military Assistance Command, Vietnam.

ComUSMACThai - Commander, U.S. Military Assistance Command, Thailand,

COSVN-Central Office of South Vietnam, the nominal Communist military and political headquarters in South Vietnam.

CP-Command Post.

C PX - Command Post Exercise.

CRC - Control and Reporting Center, an clement of the U.S. Air Force tactical air control system, subordinate to the Tactical Air Control Center, which conducts radar and warning operations-

CRIMP - Consolidated Republic of Vietnam Improvement and Modernization Plan,

CSC-Communications Service Company.

CV, CVA-Multipurpose Aircraft Carrier.

DAO-Defense Attache Office.

DASC-Direct Air Support Center, a subordinate operational component of the air control system designed for control of close

air support and other direct air support operations.

DC-8 - McDonnell Douglas Jet Trader, a four-engine jet cargo and

passenger transport aircraft.

D-Day-Day scheduled for the beginning of an operation.

DD - Destroyer.

DDG-Guided Missile Destroyer.

DE-Escort Destroyer.

DIA- Defense Intelligence Agency.

Div-Division.

DMZ-Demilitarized Zone separating North and South Vietnam.

DOD-Department of Defense.

DRV-Democratic Republic of Vietnam (North Vietnam).

Dtd-Dated.

Duster-Nickname for the US, M42 tracked vehicle which mounts

dual 40mm automatic weapons.

EA-6 - Grumman Prowler, the electronic warfare version of the A-6A

Intruder.

EB-66-Douglas, a twin-engine jet, electronic warfare version of

the B-66 Destroyer.

EC-130-Lockheed, a four-engine, turbo-prop, electronic warfare

and communications version of the C-130 Hercules.

ECC - Evacuarion Conrrol Cenrer.

ECM-Electronic Countermeasures, a major subdivision of electronic

warfare involving actions against enemy electronic equipment

or ro exploir the use of electromagnetic radiations from such

equipment.

ECCM - Electronic Counter Countermeasures, the procedures and

equipment used to protect communications and electronic

equipmcm from interference or exploitation by an enemy.

ELINT-Electronic Intelligence, the intelligence information gained

by monitoring radiations from enemy electronic equipment.

Engr-Engineer.

EOD-Explosive Ordnance Disposal.

EP C - Evacuation Processing Center.

ETA. E TD - Estimated Time of Arrival and Estimated Time of

Departure.

ExO-Executive Officer.

F-4-McDonnell Phantom II, a twin-engine, two-seat, long-range, all-weather jet interceptor and attack bomber.

F-5-Northrop Freedom Fighter, a twin-engine, single-seat, jet fighter aircraft.

FAC-Forward Air Controller.

FAC(A)-Forward Air Controller (Airborne).

FANK-fvirce Armee Nationals Khmer, the Cambodian Army.

PDC-Fire Direction Center.

FMFPac-Fleet Marine Force, Pacific.

FO-Forward Observer.

FRC-Federal Records Center,

Front 4- Communist headquarters subordinate to MR-5 responsible for Quang Nam Province.

FSB-Fire Support Base.

FSCC-Fire Support Coordination Center, a single location involved in the coordination of all forms of fire support.

FSR-force Service Regiment.

FWMF-Free World Military Force.

FY-Fiscal Year, for example "FY-74."

G-l, -2, et at,-Military staff positions on a general staff, e.g., G-l refers to the staff member responsible for personnel; G-2, intelligence; G-3, operations; G-4, logistics; and G-5, civil affairs.

Gen-General.

Grenade Launcher-US. M79 or M203 single-shot, breech-loaded, shoulder weapon which fires 40mm projectiles and weighs approximately 6.5 pounds when loaded; it has a sustained rate of aimed fire of five to seven rounds per minute and an effective range uf 375 meters,

GSF-Ground Security Force.

Gun, 175mm - U.S. M107 self-propelled gun which weighs 62,000 pounds and fires a 147-pound projectile to a maximum range of 32,800 merers. Maximum rate of fire is one round every two minutes.

GVN-Government of Vietnam (South Vietnam).