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cooled automatic weapon,
which weighs approximately 80
pounds without
mount or ammunirion; it has a sustained rate
of fire of
100 rounds per minute and an effective range of 1,450
meters.
Machine Gun, 7.62mm-U.S.
M60 belt-fed, gas-operated, air-cooled
automatic
weapon, which weighs approximately 20 pounds
without mount
or ammunition; it has a sustained rate of fire
of 100 rounds
per minute and an effective range of 1,000 meters.
MACS-Marine Air Control
Squadron, provides and operates
ground facilities
for the detection and interception of hostile
aircraft
and for the navigational direction of friendly aircraft in
the conduct
of support operations.
MACV-Military Assistance
Command, Vietnam. MAF-Marine Amphibious
Force. MAG-Marine Aircraft
Group. Main Force- Refers to
organized Viet Cong battalions and regiments
as opposed
to local guerrilla groups.
MajGen-Major General. MarDiv-Marine Division. Marines-Designates an
infantry regiment, e.g., 3d Marines. MASS-Marine Air Support
Squadron, provides and operates fa-
cilities
fur the control of aircraft operating in direct support of
MAU Marine Amphibious
Unit, not to be confused with the Ma-
rine Advisory
Unit of the Naval Advisory Group which ad-
ministered
the advisory effort to rhe South Vietnamese Marine
Corps.
MarAdvU-Marine Advisory
Unit. MAW-Marine Aircraft
Wing. MCAF-Marine Corps Air
Facility. MCAS-Marine Corps Air
Station. MCCC-Marine Corps Command
Center. MCO-Marine Corps Order. MCOAG-Marine Corps Operations
Analysis Group, an organiza-
tion of the
Center for Naval Analyses in Washington, D.C.
MCSA-Marine Corps Supply
Agency. Medevac-Medical Evacuation. MEDTC-Military Equipment
Delivery Team, Cambodia. MiG Mikoyan-Gurevich
designed Soviet aircraft. MO Mount Out, loaded
and ready classes of supplies for contin-
gency use
by amphibious forces.
MOA Mount Out Augmentation. MODLOC-Modified Lxarion,
radius around a specified point from
which naval
ships may transit while waiting employment.
Mortar, 4.2 inch-U.S.
M30 rifled, muzzle-loaded, drop-fired
weapon consisting
of tube, base-plate and Standard; weapon .
Rate of fire
is 20 rounds per minute. Also known as the
Mortar, 60mm-U.S. M19
smooth-bore, muzzle-loaded weapon
which weighs
45.2 pounds when assembled; it has a maximum
rate of
fire of 30 rounds per minute and sustained rate of fire
of 18 rounds
per minute; the effective range is 2.000 meters.
Mortar, 81mm-U.S. M29
smooth-bore, muzzle-loaded weapon
which weighs
approximately 115 pounds when assembled; it has
a sustained
rate of fire of two rounds per minute and an effec-
tive range
of 2,300-3,650 meters, depending upon ammunition
used.
Mortar, 82mm- Communist
smooth-bore, single-shot, high angle
of fire weapon
which weighs approximately 123 pounds; it has
a maximum
rate of fire of 25 rounds per minute and a maxi-
mum range
of 3,040 meters.
Mortar, 120mm-Communist
smooth bore, drop- or trigger-fired
mortar which
weighs approximately 600 pounds; it has a maxi-
mum rate
of fire of 15 rounds per minute and a maximum range
of 5,700
meters.
MR- Military Region.
South Vietnamese army corps tactical zones
were redesignated
military regions in 1970, e.g., I Corps Tacti-
cal Zone
became Military Region l (MR-1).
MR-5- Communist political
and military sector in South Vietnam,
including
all of Military Region l, NVA units in MR.-5 did not
report to
COSVN.
MSC-Military Sealift
Command. MSG-Marine Security
Guard.     NAIL-Radio call sign
for USAF OV-10 aircraft. NAS-Naval Air Station. NATOPS - Naval Air Training
and Operating Procedures Standardization. NCC-Naval Component
Commander. NCO-Noncommissioned
Officer. NEmVac-Noncombatant
Emergency Evacuation. NGLO - Naval Gunfire
Liaison Officer. NGS Naval Gunfire Support. NKP-U.S. Air Force designation
for Nakhon Phanom Air Base,
Thailand.
NLF-National Liberation
Front, the political arm of the
Communist-led
insurgency against the South Vietnamese
Government.
NMCB- Naval Mobile Construction
Battalion, whose members are
known as
"SeaBees."
NMCC-National Military
Command Center. NOD-Night Observation
Device. NPFF-National Police
Field three. NSD-Naval Supply Depot. Nui-Vietnamese word for
hill or mountain. Nung-Southeast Asian
tribesman, of an ethnic group of proba-
bly Chinese
origin.
NVA-North Vietnamese
Army, the Peoples Army of Vietnam
(PAVN); term
often used by Americans to refer to a North Viet-
    O-1-Cessna Bird Dog,
a single-engine, propeller-driven observa-
tion aircraft.
O-2-Cessna Skymaster.
a dual-engine, propeller-driven observa-
tion aircraft.
OH-6 - Hughes Cayuse,
single-rotor light helicopter used for armed
reconnaissance
and observation- Also known as a "Loach."
OH-58-Bell Kiowa, single-rotor
light helicopter used for armed
reconnaissance
and observation.
OIC-Officer-in-Charge. OpCon-Operational Control,
the authority granted to a com-
mander ro
direct forces assigned for specific missions or tasks

which are usually
limited by function, time, or location.



Page 291(The Bitter End)