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The M577 Command Post Carrier, also known as the M577 Command Post Vehicle or Armored Command Post Vehicle, is a variant of the M113 Armored Personnel Carrier that was developed and produced by the Food Machinery and Chemical Corporation (FMC) to function on the
battlefield A battlefield, battleground, or field of battle is the location of a present or historic battle involving ground warfare. It is commonly understood to be limited to the point of contact between opposing forces, though battles may involve troops ...
as a mobile
command post Command and control (abbr. C2) is a "set of organizational and technical attributes and processes ... hatemploys human, physical, and information resources to solve problems and accomplish missions" to achieve the goals of an organization or en ...
i.e. a tactical operations centre, usually at the
battalion A battalion is a military unit, typically consisting of 300 to 1,200 soldiers commanded by a lieutenant colonel, and subdivided into a number of companies (usually each commanded by a major or a captain). In some countries, battalions are ...
level. In U.S. military service its official designation is ''Carrier, Command Post, Light Tracked M577''. Introduced to the
U.S. Army The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, cl ...
in 1962 it soon saw operational service in the
Vietnam War The Vietnam War (also known by #Names, other names) was a conflict in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. It was the second of the Indochina Wars and was officially fought between North Vie ...
and more recently in the
2003 invasion of Iraq The 2003 invasion of Iraq was a United States-led invasion of the Republic of Iraq and the first stage of the Iraq War. The invasion phase began on 19 March 2003 (air) and 20 March 2003 (ground) and lasted just over one month, including 26 ...
. It is also used by many armies around the world and has been adapted for further uses such as an armoured ambulance, emergency medical treatment vehicle and
fire control Fire control is the practice of reducing the heat output of a fire, reducing the area over which the fire exists, or suppressing or extinguishing the fire by depriving it of fuel, oxygen, or heat (see fire triangle). Fire prevention and control ...
vehicle. It is also used by various police forces and law enforcement agencies as a tactical response vehicle. The M577 is easily distinguished from the M113 upon which it is based by its raised upper hull and roof-mounted
auxiliary power unit An auxiliary power unit (APU) is a device on a vehicle that provides energy for functions other than propulsion. They are commonly found on large aircraft and naval ships as well as some large land vehicles. Aircraft APUs generally produce 115&n ...
(APU). Vehicles are generally unarmed.


Background

The experience gained by the U.S. Army in the
Second World War World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...
showed that close co-operation between infantry and armoured forces is a necessity for. Mobile warfare increases both the scope and size of the theatre of operations, and mobile command and control posts are necessary to co-ordinate operations at the divisional, brigade and battalion levels. Whereas tanks and armoured cars offered a level of protection against weapons fire, they usually did not provide sufficient internal room to permit the extra personnel needed to operate all the radio sets. On the other hand, lightly or unarmed vehicles could be used to transport temporary structures (e.g. tents) that gave greater work space, but these structures lacked protection from direct and indirect weapons fire, and advancing front line units could exceed the communication range the command post, necessitating the dismantling and removal of the structure to a new location. Furthermore, experience gained in the snow and mud in
Korea Korea ( ko, 한국, or , ) is a peninsular region in East Asia. Since 1945, it has been divided at or near the 38th parallel, with North Korea (Democratic People's Republic of Korea) comprising its northern half and South Korea (Republic o ...
showed the advantage of tracked over wheeled vehicles. As at 1960, no such vehicle existed in the U.S. Army inventory that was able to satisfy all of these requirements.


Development

The first four prototypes were built in February 1962 by United Defense Industries at the U.S. Army's Detroit Arsenal under the designation of the XM577 and were conversions of M113 APCs. Upon completion in March 1962 the first vehicle was shipped to the Aberdeen Proving Ground for engineering tests while the remaining three vehicles were shipped to the Armor, Infantry and Artillery Boards for evaluation tests. The results of all tests were generally positive and the vehicle went into immediate production with the first batch of 270 vehicles accepted into U.S. Army service between in December 1962 and March 1963. In March 1963 under Standard A Acceptance the XM577 was redesignated as the M577, indicating official status as a regular production vehicle. Production began on a second batch of 674 vehicles in November 1963, all of which entered service by the middle of 1964.


Design


Chassis and hull

The M577 shares the chassis, lower hull and running gear from the M113 upon which it is based. The hull sides from the engine firewall to the rear cargo ramp were extended by for a maximum headroom in the rear compartment of , allowing operators to perform duties standing up. On the roof the commander's cupola of the M113 APC has been replaced with circular hatch similar to the driver's hatch, and the large rectangular hatch over the troop compartment has been dispensed with. There is no external weapons stations fitted to the M577, although most vehicles were fitted with an internal rifle rack.


Electrical system

Mounted to the front of the raised upper hull, centrally located to the right of the driver's hatch, is a 4.2kW 28V 150A gasoline auxiliary power unit (generator) that provides power to the M577/M1068's auxiliary equipment (dependent upon variant as specified below) without the vehicle's main engine running. The unit can be used to power two vehicles, and can be removed from its mounting basket using a lifting davit located on the vehicle's roof and operated from within or alongside the vehicle using a extension cable. As part of the A3 upgrade, a more powerful 5.0kW unit was fitted. Unlike the previous gasoline-fuelled unit, the new unit operates on diesel fuel providing more hours of operation on a equivalent fuel load.


Interior

The single 80 gallon internal fuel tank of the M113 (located at the rear left) is replaced by two 60 gallon tanks (thus providing a greater operating range than a M113) located each side near the rear, which also serve as the base for fold-out tables. Radios are usually fitted along the left wall, as well as the front of the right wall. Map boards are usually fitted along the walls, along with additional storage facilities for maps and code books etc. Overhead dome lights were fitted within the rear compartment. A personal heater is located at the front right of the compartment, which also serves as an equipment heater in Arctic and winter operations. A 5-man bench seat could be fitted to either or both sides of the rear compartment, although in some vehicles no seating was fitted whatsoever. The rearward-facing seat on the commander's station was also dispensed with. For the M1068 inward-facing individual seats for two operators replaced the bench seat. Further folding tables and chairs are often carried, stowed while the vehicle is in transit.


Equipment

Equipment fitted within the rear compartment of the M577/M1068 varies according to the vehicle's purpose.


Command post vehicles

Vehicles are equipped with additional radio sets as found in a standard M113 APC, so as to provide command and control facilities across the unit (e.g. battalion) and coordinate with other units and higher levels of command (e.g. regimental HQ). Removable antenna masts are usually carried and attached to the vehicle's roof. In U.S. Army service each vehicle usually carries three of four different communications suites (radio sets), each providing a specific communication network according to the communications roles they were assigned e.g. to divisional headquarters, across all vehicles within the unit (battalion), etc. The suites operated over
amplitude modulation Amplitude modulation (AM) is a modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude modulation, the amplitude (signal strength) of the wave is varied in proportion to ...
(AM),
continuous wave A continuous wave or continuous waveform (CW) is an electromagnetic wave of constant amplitude and frequency, typically a sine wave, that for mathematical analysis is considered to be of infinite duration. It may refer to e.g. a laser or particle ...
(CW) and
frequency modulation Frequency modulation (FM) is the encoding of information in a carrier wave by varying the instantaneous frequency of the wave. The technology is used in telecommunications, radio broadcasting, signal processing, and Run-length limited#FM: .280. ...
(FM), with the frequencies and number of channels, and transmission and reception range determined by the set. Communication suites were originally analogue, but with the introduction of the M577A3 and A4 have mostly been upgraded to digital. Analogue radio sets fitted to the M577 in U.S. service include: *AM/CW: **AN/GRC-19 **AN/VRC-24 **AN/CRR-5 **AN/WRC-29 *FM (original): **AN/VRC-3 to AN/VRC-8 **AN/VRC-10 **AN/VRC-13 to AN/VRC-15 **AN/VRC-20 to AN/VRC--22 *FM (later): **AN/VRC-26 **AN/VRC-46, AN/VRC-47 **AN/VIC-1 *Interphone: **AN/DIC-1 *Teletype: **AN/GRC-24


Medical vehicles

It must be recognised that there was no such thing as a standardised M577 medical vehicle. Vehicles were configured according to the country operating them and internal configuration and equipment varied accordingly, which was also defined as to whether they were used as an emergency evacuation (ambulance) or treatment vehicles. In U.S. service it appears that M577s were only used as emergency evacuation vehicles very early in their operation careers i.e. in the early years of the
Vietnam War The Vietnam War (also known by #Names, other names) was a conflict in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. It was the second of the Indochina Wars and was officially fought between North Vie ...
, and this role was soon provided solely by M113 "armoured ambulances", and the M577 was then only used as emergency treatment vehicles (e.g. battalion aid stations). However, when configured as an ambulance, compared to a M113 which could be fitted with up to four
litters Litter consists of waste products that have been discarded incorrectly, without consent, at an unsuitable location. Litter can also be used as a verb; to litter means to drop and leave objects, often man-made, such as aluminum cans, paper cups ...
, the extra room inside the M577 allowed it to carry two additional litters i.e. up to a maximum of six.


Other variants

Vehicles configured for other roles were configured with specialised equipment accordingly e.g. M577 Fire Control Vehicles were often fitted with TACFIRE artillery control consoles.


Tent extension

A tent extension attaches to the rear of the vehicle above and around the rear cargo ramp, increasing the workspace available to operators, and in the case of the emergency treatment vehicles, to function as a field dressing station or hospital. The tent is erected over collapsible steel tubing, which is carried in brackets on the rear of the vehicle. The tent can be connected to up to four vehicles (parked in a cross) to provide a common work area. With the introduction of the M1068 SICPS Carrier, the M577-specific tent was replaced with a
Modular Command Post System The Modular Command Post System (MCPS) is a modular tent system for mobile or temporary tactical operations centers, developed in the early-mid 1990s by the United States Army. The tents are designed to be utilised as a free-standing shelter ...
(MCPS) tent, which attaches to the rear of the vehicle by a "bootwall" that covers the rear of the vehicle but still has an entrance to the vehicle's interior. The MCPS tent has the advantage of being quicker and easier to erect and dismantle, provides overhead lighting and power sockets for electrical equipment, and the modular design of MCPS allows more tents to be easily connected.


Production

Ownership of title for and production of the M577 has changed many times over the vehicle's history due to corporate buy-outs and take-overs. Originally produced by FMC's combat vehicles division
United Defense Industries United Defense Industries (UDI) was an American defense contractor which became part of BAE Systems Land & Armaments after being acquired by BAE Systems in 2005. The company produced combat vehicles, artillery, naval guns, missile launchers and ...
(UDI), in 1995 UDI was purchased by
Harsco Corporation Harsco Corporation is a global industrial company based in Camp Hill, Pennsylvania. Harsco operates in 30 countries and employs approximately 11,000 people worldwide. The company provides industrial services and engineered products that serve ...
to become United Defense (UD). In 2005 UD was then purchased by
BAE Systems BAE Systems plc (BAE) is a British multinational arms, security, and aerospace company based in London, England. It is the largest defence contractor in Europe, and ranked the seventh-largest in the world based on applicable 2021 revenues. ...
(BAE) and as at February 2020, the M577 is within the company's ''Global Combat Systems Ground Vehicles'' portfolio of current products in the subsidiary BAE Systems Platforms & Services. The M577 is also produced or remanufactured locally in several countries under licence from or in partnership with BAE; this includes: *Australia, by
Tenix Defence Tenix Defence was Australia's largest defence contractor with core capabilities in Aerospace, Land, Marine and Electronic Systems applications. BAE Systems announced its intention to acquire the company from Tenix in January 2008 and the acquisitio ...
*Germany, by Flensburger Fahrzeugbau GmbH (FFG) *Italy, by
OTO Melara OTO Melara was a subsidiary of the Italian company Finmeccanica, today Leonardo, active in the defence sector, with factories in Brescia and La Spezia. The Mod 56 pack howitzer, in service throughout the world, and the 76mm naval gun, ado ...
*South Korea, by Daewoo Heavy Indistries *Taiwan, by the
Republic of China Armoured Vehicle Development Center Republic of China Armoured Vehicle Development Center () is a military designer and manufacturer in Taiwan which has been a supplier armoured vehicles for the Republic of China Army and Republic of China Marine Corps. The center was formed in 1980 ...
*Turkey, by
FNSS Defence Systems FNSS Savunma Sistemleri A.Ş. ( en, FNSS Defence Systems A.Ş.) is a Turkish defense manufacturer founded in 1988. It is owned 51% by Nurol Holding of Turkey and 49% by British–American firm BAE Systems Inc., and operates facilities located i ...
In total, more than 7300 vehicles have been built (of which around 3900 were M577A1), making the M577 the most numerous single variant of the M113 family after the APC.


Basic versions

The M577 has followed a similar upgrade path to the M113 upon which it is based, resulting in the following basic versions:


M577

Original version based on the M113 chassis. Specifications and performance are as follows:


M577A1

Initial upgraded version based on the M113A1, introduced in 1964. The gasoline engine was replaced with a more powerful diesel engine providing better fuel economy and a greater operating range, as well as the reducing the fire hazard of gasoline fuel. Specifications and performance are as follows:


M577A2

In 1979 further upgrades were introduced based on the M113A2. Engine cooling was improved by switching the locations of the fan and radiator. Higher-strength torsion bars increased ground clearance, and shock absorbers reduced the effects of ground strikes. Increased weight affected the vehicle's
freeboard In sailing and boating, a vessel's freeboard is the distance from the waterline to the upper deck level, measured at the lowest point of sheer where water can enter the boat or ship. In commercial vessels, the latter criterion measured relativ ...
when afloat, and it was no longer required to be amphibious. Four-tube smoke grenade launchers were also added on each side of the trimvane on the front of the vehicle. Specifications and performance are as follows:


M577A3

In 1987 further improvements were introduced based upon Reliability Improved Selected Equipment (RISE) package fitted to the M113A3. This included a yoke for steering instead of laterals (tillers), a more powerful
turbocharged In an internal combustion engine, a turbocharger (often called a turbo) is a forced induction device that is powered by the flow of exhaust gases. It uses this energy to compress the intake gas, forcing more air into the engine in order to pro ...
engine with a larger alternator increasing output from 100A to 200A, and internal spall liners for improved fragmentation protection for occupants. Weight increased again, and some vehicles were fitted with the larger trimvane from the M113A3 to offset the freeboard issues first encountered with the M577A2. Specifications and performance are as follows:


M577A4

The A4 is the next generation modernised version of the M577 Command Post Vehicle production version developed by BAE Systems (and in partnership with FNSS). Fitted with upgraded digital systems and communications suites, applique armour and external armoured fuel tanks similar to those fitted to the M113A3 on both sides of the rear ramp, freeing up more internal space. An improved version of the 6V53T turbo-diesel engine with power increased to is installed, along with an improved '4B' version of the TX-400 automatic transmission. The new vehicle has a maximum capacity of seven personnel: driver, vehicle commander and up to five staff officers or system operators, and can be configured as a Fire Direction Centre Vehicle. Limited in numbers and used as the basis for the M577A4 Armored Treatment Vehicle.


Variants

Like the M113 upon which it is based, there are many variants of the M577 in service, many specific to a particular country's army.


Australia

;M113AS3 Armoured Command Vehicle (ACV) In 1965 the
Australian Army The Australian Army is the principal Army, land warfare force of Australia, a part of the Australian Defence Force (ADF) along with the Royal Australian Navy and the Royal Australian Air Force. The Army is commanded by the Chief of Army (Austral ...
purchased 58 M577A1s in 1965 with some vehicles immediately shipped to
Vietnam Vietnam or Viet Nam ( vi, Việt Nam, ), officially the Socialist Republic of Vietnam,., group="n" is a country in Southeast Asia, at the eastern edge of mainland Southeast Asia, with an area of and population of 96 million, making i ...
for operational duty with the 1st APC Troop. Operational experience with the M113A1 showed that vehicles of this family were vulnerable to hull damage from enemy mines, and an indigenous armour upgrade kit was soon developed and fitted to all vehicles. The upgraded armour consisted of a folded aluminium plate installed under each sponson for the first three road wheels on each side of the vehicle. In 1970, a further 38mm of aluminium armour was fitted along the entire bottom of the hull, which greatly reduced crew and passenger casualties even from large mines. This armour upgrade package was subsequently fitted to all M577s (and other M113 vehicles) purchased to replace those lost during the war. In Australian service the M577A1 ACV was originally fitted with both U.S. and British radio sets, reflecting the dual origins of their pieces of major equipment. Vehicles would normally carry up to five sets e.g. three AN/GRC-125, one AN/VRC-49 and one AN/GRC-106. AS-1729/VRC antennae were mounted on the vehicle's roof, and an RC-292 antenna could be set up outside the vehicle when it was static to provided significantly more range for the vehicle's radios. Commencing in 2002 as part of the Land 106 program, the M113 Major Upgrade Project saw 43 M577A1 ACVs upgraded to local AS3 standard and redesignated as the M113AS3 ACV. The upgrade package consisted of: * MTU 6V199TE diesel engine * ZF LSG 1000 R automatic transmission with 6 forward and 2 reverse gears * Cooling system capable of operating in ambient conditions * Air conditioning and chilled water dispenser for crew comfort * Applique armour and spall liners for improved crew protection * Yoke steering with pivot turn capability * Upgraded suspension * Twin-caliper disc brakes with dual hydraulic system and separate mechanical handbrake * Digital communication suite ;M113AS3 Armoured Ambulance The Australian Army also operated a number of M577A1 Armoured Ambulances, which effectively serve as both emergency treatment and evacuation vehicles. As part of the M113 Major Upgrade Project, 15 of these vehicles were converted to a similar AS3 standard as the ACV and redesignated as the M113AS3 Armoured Ambulance.


Canada

;TLAV-CP Based on the M577A3 Command Post Vehicle, 23 vehicles were in service with the Canadian Army. Nicknamed the 'Queen Mary', the vehicle is equipped with an upgraded communications suite. Externally, additional stowages are mounted on the vehicle's roof, along with removable antenna masts. At the front of the vehicle a stowage basket is attached to the engine cover in place of the trim vane, and cable cutters were mounted at each side. A transparent
perspex Poly(methyl methacrylate) (PMMA) belongs to a group of materials called engineering plastics. It is a transparent thermoplastic. PMMA is also known as acrylic, acrylic glass, as well as by the trade names and brands Crylux, Plexiglas, Acrylite ...
shield was often fitted in front of the driver's hatch for Arctic operations. Snow hawsers and spiked "ice cleats" were carried on external mountings. From 2001, the Diehl 213G steel tracks were replaced by Soucy rubber band tracks for quieter operation on roads and better operation on snow and ice.


Germany

;M577G GefStdPz In German service, the M577 and M577A1 received different fire extinguishing and heating systems, modified periscopes and SEM 25/30 radios, and were known as the M577G and M577GA1 ''Gefechtsstandspanzer''(GefStdPz) . In the late 1980s M577GA1s were upgraded to A2 standard and were designated M577GA2. These vehicles operated in four different roles: * air liaison * command and control * information gathering * printed communications (
teletype A teleprinter (teletypewriter, teletype or TTY) is an electromechanical device that can be used to send and receive typed messages through various communications channels, in both point-to-point and point-to-multipoint configurations. Initia ...
equipped) Vehicles received further upgrades under the ''Nutzungsdauerverlängerung'' (NDV) program consisting of: * dual-circuit braking system with mechanical handbrake * new driving and steering dashboards * SEM 80/90 radios * Diehl 513 tracks The M112GA2 is distinguished from U.S. and other
NATO The North Atlantic Treaty Organization (NATO, ; french: Organisation du traité de l'Atlantique nord, ), also called the North Atlantic Alliance, is an intergovernmental military alliance between 30 member states – 28 European and two No ...
M577s stationed in Germany by the following external features: * stowage basket fitted to the front replacing the trim vane * a row of eight 76mm smoke grenade dischargers located between the front stowage basket and the top of the hull * changes to the front light clusters consisting of a large main driving light, a smaller dimmed night driving light and indicators * rear vision mirrors on each front corner to aid the driver * different rear light clusters * the APU mounted on the front of the upper hull is offset to the right


Israel

;Mugaf Israeli designation of the M577 Command Post Carrier. Vehicles are equipped with external stowages and storage racks along the hull sides, similar to those seen on
IDF IDF or idf may refer to: Defence forces * Irish Defence Forces * Israel Defense Forces *Iceland Defense Force, of the US Armed Forces, 1951-2006 * Indian Defence Force, a part-time force, 1917 Organizations * Israeli Diving Federation * Interac ...
M579 Fitter's vehicles.


Norway

;NM196 The NM196 ''Hjelpeplasspanservogn'' was the medical treatment version of M577A2. This vehicle saw the following upgrades during its service life: *NM196F1: fitted with interior spall liners. *NM196F3: F1 upgrade plus upgrades to the driveline, caterpillar diesel engine, add-on armour and redesigned interior and treatment facilities. ;NM198 The NM198 ''Kommandopanservogn'' was the local variant of the M577A2 Command Post Vehicle. This vehicle saw the following upgrade(s) during its service life: *NM198F1: fitted with interior spall liners.


South Korea

;K277 Developed in the 1980s, the K277 is a locally produced version of the M577A1 Command Post Vehicle featuring a different engine and transmission – a
MAN A man is an adult male human. Prior to adulthood, a male human is referred to as a boy (a male child or adolescent). Like most other male mammals, a man's genome usually inherits an X chromosome from the mother and a Y chromos ...
D2848T V8 diesel engine made under licence by Doosan and
Allison Allison may refer to: People * Allison (given name) * Allison (surname) (includes a list of people with this name) * Eugene Allison Smith (1922-1980), American politician and farmer Companies * Allison Engine Company, American aircraft engine ...
X200-5K
automatic transmission An automatic transmission (sometimes abbreviated to auto or AT) is a multi-speed transmission used in internal combustion engine-based motor vehicles that does not require any input from the driver to change forward gears under normal driving c ...
. The upper and lower hull of the vehicle is fitted with a layer of spaced laminate steel armour similar to that fitted to the K200 IFV which provides increased ballistic protection as well as extra buoyancy. The front of the vehicle is fitted with the armoured trim vane from the K2000. Vehicles are usually armed with a Browning M2 HB 12.7mm heavy machine gun. The K277A1 is an upgraded version with a more powerful engine and transmission,
NBC The National Broadcasting Company (NBC) is an Television in the United States, American English-language Commercial broadcasting, commercial television network, broadcast television and radio network. The flagship property of the NBC Enterta ...
protection and an automatic fire extinguishing system. With the additional armour and other changes, the K277 is heavier than the M577.


Taiwan

;CM-26 Command Track Commencing service with the
Republic of China Army The Republic of China Army (ROCA), previously known as the Chinese Nationalist Army or Nationalist Revolutionary Army and unofficially as the Taiwanese Army, is the largest branch of the Republic of China Armed Forces. An estimated 80% of the ...
in 1982, the CM-26 Command Track is a locally built variant based upon the M577A2 that shares key components from the CM-21A1 Armored Infantry Fighting Vehicle. Unlike the CM-21A1, which varies extensively (it resembles the Armored Infantry Fighting Vehicle (AIFV)) from the M113A2 upon which it is based, changes to the CM-26 are mostly limited to its engine and transmission. The vehicle is fitted with a
Perkins Perkins is a surname derived from the Anglo-Saxon corruption of the kin of Pierre (from Pierre kin to Pierrekin to Perkins), introduced into England by the Norman Conquest. It is found throughout mid- and southern England. Another derivation com ...
TV8.640 turbo-diesel which provides significantly more power than the of the Detroit Diesel 6V-53 fitted to the M113A2/M577A12. The engine is coupled to a locally built automatic transmission developed by Taiwans'
Industrial Technology Research Institute The Industrial Technology Research Institute (ITRI; ) is a technology research and development institution in Taiwan. Founded in 1973, ITRI has contributed to moving Taiwan's industries from labor-intensive to innovation-driven. ITRI is hea ...
and is similar to the Allison TX-200-1 fitted to the M113A1/M577A1 and features four forward and one reverse gears. The vehicle is also fitted with night vision driving aids, NBC protection, improved communications suite and other minor changes.


United States

*M577/A1 Battalion Aid Station: early nomenclature for emergency treatment vehicles, but appears to be a description of the role in which the vehicles operated rather than an official designation. *M577/A1 Armored Ambulance:early nomenclature for emergency evacuation vehicles, but appears to be a description of the role in which the vehicles operated rather than an official designation. *M577A2/3 Emergency Medical Treatment Vehicle: standardised and officially designated emergency evacuation vehicle (i.e. armoured ambulances) based on A2 and later A3 upgrades. *M577A2E2: featuring a chassis lengthened by 34 inches and fitted with an extra road wheel on each side (for a total of six). First developed in 1988, as at 2007 it is still a prototype. *
M577A4 Armored Treatment Vehicle The M577A4 Armored Treatment Vehicle (ATV) is a U.S. Army variant of the M577 Command Post Carrier made by United Defense (now part of BAE Systems) which has been modified to function as an emergency medical treatment vehicle for personnel wound ...
: recent upgrade to the M577A3 Emergency Medical Treatment Vehicle. Limited numbers. *M1068 Standard Integrated Command Post System (SICPS) Carrier: following the 1991
Gulf war The Gulf War was a 1990–1991 armed campaign waged by a 35-country military coalition in response to the Iraqi invasion of Kuwait. Spearheaded by the United States, the coalition's efforts against Iraq were carried out in two key phases: ...
approximately two-thirds of the U.S. Army's inventory of M577A2 vehicles were fitted with the new Army Tactical Command and Control System (ATCCS) and redesignated as the M1068. Externally, the new vehicles are identical to the M577 but featured many internal changes, including: ** digital communication suite including GPS and "blue force" tracking ** power/data distribution system ** new stowages and equipment racks, including for computers ** 220/240V AC power inverters for COTS computer equipment ** seating for two operators (crew is reduced from five to four from M577A2) ** later fitted with upgraded 5kW 180A 28V DC diesel generator (as fitted to M577A3) ** also features a antenna and a new tent, the ''Modular Command Post System'', which can also be used as a stand-alone command post. *M1068A3 SICPS: M1068 upgraded to M577A3 standard featuring the RISE engine and transmission upgrade package. Vehicles not upgraded to A3 standard were redesignated as M1068 (Basic),


Operators


Military


Current operators

* : in 2005 the
Afghan National Army Afghan may refer to: *Something of or related to Afghanistan, a country in Southern-Central Asia * Afghans, people or citizens of Afghanistan, typically of any ethnicity **Afghan (ethnonym), the historic term applied strictly to people of the Pas ...
received 15 second-hand M577A2 vehicles from the U.S. * : in 1967 the
Argentine Army The Argentine Army ( es, Ejército Argentino, EA) is the land force branch of the Armed Forces of the Argentine Republic and the senior military service of Argentina. Under the Argentine Constitution, the president of Argentina is the commander- ...
received 10 10 M577A1 Command Post Vehicles, and a further 10 in 1992. * : the Australian Army operated a fleet of up to 70 M577A1s used as command post vehicles and armoured ambulances. For those mechanised/motorised units whereby the M113A1 APC and other variants have been replaced by the
ASLAV The Australian Light Armoured Vehicle (ASLAV) is an eight-wheeled amphibious armoured reconnaissance vehicle of the LAV II family used by the Australian Army. It was built by General Dynamics Land Systems Canada, and developed from the U.S. Mari ...
family of vehicles, the M577A1 has been replaced by the ASLAV Armoured Command Vehicle. Between June 2002 and September 2012, under the M113 Major Upgrade Project 43 M577A1 Armoured Command Vehicles and 15 M577A1 Armoured Ambulances were upgraded and re-designated the M113AS3 Armoured Command Vehicle and M113AS3 Armoured Ambulance respectively. These vehicles are due to replaced from 2025 with the equivalent variant(s) of a new Infantry Fighting Vehicle under Phase 3 of the Land 400 program. * : operates three (3) M577A1 sourced from the Netherlands and fifteen (15) M577A2 sourced from the U.S. * : in 2015 Brazil negotiated with the U.S. through the Foreign Military Sales program the purchase of up to 200 surplus M577A2 vehicles. As at October 2018, 124 vehicles have been delivered. In September 2020, the U.S. donated a further 20 vehicles. The vehicles will operate in the roles of ambulance, command centre and communications. * : as at 2015 the
Canadian Army The Canadian Army (french: Armée canadienne) is the command responsible for the operational readiness of the conventional ground forces of the Canadian Armed Forces. It maintains regular forces units at bases across Canada, and is also respo ...
were operating 33 M577A3 Command Post Vehicles which are scheduled to be replaced by the LAV 6.0 Armoured Combat Support Vehicle between 2020 and 2025. * : between 1980 and 2002 the Egyptian Army purchased 280 M577s from the U.S. * : the
Hellenic Army The Hellenic Army ( el, Ελληνικός Στρατός, Ellinikós Stratós, sometimes abbreviated as ΕΣ), formed in 1828, is the land force of Greece. The term ''Hellenic'' is the endogenous synonym for ''Greek''. The Hellenic Army is the ...
operates 249 M577A2 Command Post Vehicles. Many units were purchased second-hand from the U.S. * : known as the ''Mugaf'' in Israeli service, vehicles are equipped with external stowages and storage racks along the hull sides, similar to those seen on IDF M579 Fitter's vehicles. * : in February 2018 Jordan received 180 surplus M577A3 Command Post Vehicles donated by the U.S. Army * : the
Kuwait Army The Kuwait Army, established in 1949, is the oldest armed branch among the military of Kuwait. Its cavalry and infantry predecessors operated in desert and metropolitan areas in 1919, 1920 and 1928 to 1938, tracing their roots directly to the ca ...
operates 30 M577 Command Post Vehicles, mostly M577A1s. Following the 1991
Gulf War The Gulf War was a 1990–1991 armed campaign waged by a 35-country military coalition in response to the Iraqi invasion of Kuwait. Spearheaded by the United States, the coalition's efforts against Iraq were carried out in two key phases: ...
a number of M577A3s were purchased from the U.S. to replace vehicles destroyed by Iraqis forces. * : the
Lebanese Army ) , founded = 1 August 1945 , current_form = 1991 , disbanded = , branches = Lebanese Ground ForcesLebanese Air Force Lebanese Navy , headquarters = Yarze, Lebanon , flying_hours = , websit ...
and the
Republican Guard A republican guard, sometimes called a national guard, is a state organization of a country (often a republic, hence the name ''Republican'') which typically serves to protect the head of state and the government, and thus is often synonymous wit ...
operate the M577A1. Some of these vehicles may have been captured from Israel during the 1982 and 2006 wars. * : in 2016 the
Lithuanian Land Forces The Lithuanian Land Forces (LLF) form the backbone of the Lithuanian Armed Forces, capable of acting as an integral part of NATO forces. Lithuanian Land Forces consist of three brigades, the Engineer Battalion, and the National Defence Volunte ...
purchased 168 second-hand M577s from Germany. The vehicles are used in the roles of command, indirect fire support, medical evacuation and training. * : in 2018 FFG of Germany won the contract for the supply of the new Armoured Combat Support Vehicle (ACSV), based on their Protected Mission Module Carrier (PMMC) G5. As part of this contract, the
Norwegian Army The Norwegian Army ( no, Hæren) is the land warfare service branch of the Norwegian Armed Forces. The Army is the oldest of the Norwegian service branches, established as a modern military organization under the command of the King of Norway ...
's fleet of NM196 and NM198 vehicles (local variants of the M577A2) will be modernised, including upgrading the engine and transmission to the company's G4 power pack consisting of a MTU 6V199 TE2 turbo-diesel and ZF LSG 1000 HD transmission. * : the
Portuguese Army The Portuguese Army ( pt, Exército Português) is the land component of the Armed Forces of Portugal and is also its largest branch. It is charged with the defence of Portugal, in co-operation with other branches of the Armed Forces. With its ...
has received a total of 68 M577A2 vehicles of which 49 are in service; 46 command post vehicles and 3 ambulances. * : in 1984 the
Royal Saudi Land Forces Royal Saudi Land Forces ( ar, القُوَّاتُ البَرِّيَّةُ المَلَكِيَّة السُّعُودِيَّة, Al-Quwwat al-Bariyah al-Malakiyah as-Su'udiyah) is the land warfare service branch of the Armed Forces of Saudi Ara ...
purchased an unknown number of M57712 Command Post Vehicles from the U.S., followed by an additional purchase of M577A3 versions in 1994. Commencing 2015, all vehicles were upgraded to A4 specification as part of a modernisation program for their entire fleet of M113-derived vehicles. As at June 2017, an unknown number of these vehicles remained in service. * : the
Republic of Korea Army The Republic of Korea Army (ROKA; ko, 대한민국 육군; Hanja: 大韓民國 陸軍; RR: ''Daehanminguk Yuk-gun''), also known as the ROK Army or South Korean Army, is the army of South Korea, responsible for ground-based warfare. It is the l ...
operates the K277A1, a locally-built version of the M577A1 Command Post Vehicle. * : the
Republic of China Army The Republic of China Army (ROCA), previously known as the Chinese Nationalist Army or Nationalist Revolutionary Army and unofficially as the Taiwanese Army, is the largest branch of the Republic of China Armed Forces. An estimated 80% of the ...
operates the CM-26 Command Track, a locally-built version of the M577A2 Command Post Vehicle. * : the
U.S. Army The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, cl ...
operates large numbers and many variants of the M577, most upgraded to A3 specification. Commencing September 2020, these vehicles are scheduled for replaced by equivalent variants of the
Armored Multi-Purpose Vehicle The Armored Multi-Purpose Vehicle (AMPV) is a U.S. Army program to replace the M113 armored personnel carrier and family of vehicles. AMPV is a sub-project of the Next Generation Combat Vehicle program. In 2014, the U.S. Army selected BAE Syst ...
. * : as of 2015, the
Armed Forces of Yemen The Armed Forces of Yemen ( ar, الْقُوَّاتُ الْمُسَلَّحَةُ الْيَّمَّنِيَّة, Al-Quwwat Al-Musallahah Al-Yamaniyah) are the military forces of the Republic of Yemen. They include the Yemeni Army (including t ...
operated six M577A1 Command Post Vehicles, with one vehicles assigned to each of its six mechanised brigades. With the on-going war in that country, the current status of these vehicles is unknown.


Former operators

* : commencing 2011, all M577GA2 vehicles were phased out of service, replaced by the command variant of the
Boxer Boxer most commonly refers to: * Boxer (boxing), a competitor in the sport of boxing *Boxer (dog), a breed of dog Boxer or boxers may also refer to: Animal kingdom * Boxer crab * Boxer shrimp, a small group of decapod crustaceans * Boxer snipe ee ...
wheeled AFV. Many of these surplus vehicles were later sold to Lithuania. * : the
Italian Army "The safeguard of the republic shall be the supreme law" , colors = , colors_labels = , march = ''Parata d'Eroi'' ("Heroes's parade") by Francesco Pellegrino, ''4 Maggio'' (May 4) ...
operated an unknown number of M577s, mostly command vehicles as well as some ambulances. Most were locally built (by OTO Melara) and early production units featured two-piece hull sides. All vehicles have been replaced by command variants of the
Freccia IFV The Freccia ( it, Arrow) is an Italian 8x8 wheeled Infantry fighting vehicle in use with the Italian Army. The first batch of 249 vehicles were ordered to replace Cold War VCC-2 armoured personnel carriers of the Mechanized Brigade "Pinerolo" ...
. * : operated the M577A1 Command Post Vehicle where it was nicknamed ''Bakkerskar'' (baker's car). Replaced by the command and control variant of the
CV90 The Combat Vehicle 90 (CV90; Sw. ''Stridsfordon'' 90, Strf90) is a family of Swedish tracked combat vehicles designed by Sweden's Defence Materiel Administration (''Försvarets Materielverk'', FMV), Hägglunds and Bofors during the mid-1980s to ea ...
. A small number of these surplus vehicles were sold to Bahrain. * : M577A1 Command Post Vehicle replaced by the command and control variant of the
Pinzgauer High-Mobility All-Terrain Vehicle The Pinzgauer is a family of high-mobility all-terrain 4WD (4×4) and 6WD (6×6) military utility vehicles. The vehicle was originally developed in the late 1960s and manufactured by Steyr-Daimler-Puch of Graz, Austria, and was named after ...
. * : in the 1970s the
Spanish Army The Spanish Army ( es, Ejército de Tierra, lit=Land Army) is the terrestrial army of the Spanish Armed Forces responsible for land-based military operations. It is one of the oldest active armies — dating back to the late 15th century. The ...
equipped numerous battlegroups (e.g. CWSP-05, CWSP-06, etc) within its armoured and cavalry brigades with M577A1 Command Post Vehicles. Although some of these vehicles were replaced with the BMR-PC Armoured Command Vehicle in the mid 1980s, as at 2003 an unknown number of these vehicles remained in service. However, it appears that by 2010 all remaining vehicles had been retired from service.


Law enforcement

The M577 has been adopted by various police forces and law enforcement agencies (mostly in the U.S.) as a tactical response or hostage rescue vehicle. Agencies that use the vehicle in this role include: *Calhoun County Sheriff's Office (
Iowa Iowa () is a state in the Midwestern region of the United States, bordered by the Mississippi River to the east and the Missouri River and Big Sioux River to the west. It is bordered by six states: Wisconsin to the northeast, Illinois to the ...
) *Lakeland Police Department (
Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to ...
) *Macomb County Sheriff's Office (
Michigan Michigan () is a state in the Great Lakes region of the upper Midwestern United States. With a population of nearly 10.12 million and an area of nearly , Michigan is the 10th-largest state by population, the 11th-largest by area, and the ...
) *Tampa Police Department (
Florida Florida is a state located in the Southeastern region of the United States. Florida is bordered to the west by the Gulf of Mexico, to the northwest by Alabama, to the north by Georgia, to the east by the Bahamas and Atlantic Ocean, and to ...
)


Civilian


NASA

Between 1994 and 1997,
NASA The National Aeronautics and Space Administration (NASA ) is an independent agency of the US federal government responsible for the civil space program, aeronautics research, and space research. NASA was established in 1958, succeeding t ...
(who operated four M113A2 Armored Rescue Vehicles up to the end of the Space Shuttle program) trialled the ''eXperimental HAZMAT Response Vehicle (XHRV-1)'', a modified M577A3 specifically designed for dealing with HAZMAT incidents i.e. emergency incidents involving
hazardous materials Dangerous goods, abbreviated DG, are substances that when transported are a risk to health, safety, property or the environment. Certain dangerous goods that pose risks even when not being transported are known as hazardous materials ( syllabi ...
. The vehicle, on loan from FMC, was a collaboration between NASA and the
Ames Research Center The Ames Research Center (ARC), also known as NASA Ames, is a major NASA research center at Moffett Federal Airfield in California's Silicon Valley. It was founded in 1939 as the second National Advisory Committee for Aeronautics (NACA) laborat ...
, and featured an extended 6-axle chassis similar to that of the M577A2E2, as well as external fuel tanks similar to those fitted to the M113A3. At the front was a manipulator arm for use with the hazardous materials. The driver's hatch was replaced with a transparent
polycarbonate Polycarbonates (PC) are a group of thermoplastic polymers containing carbonate groups in their chemical structures. Polycarbonates used in engineering are strong, tough materials, and some grades are optically transparent. They are easily work ...
dome, and the vehicle was hermetically sealed and fitted with an overpressure air conditioning system. The APU, normally attached to the front of the upper hull to the right of the driver, was removed. At the rear the cargo ramp was replaced with two sealed "suit ports", attached to each was a HAZMAT suit so that personnel could enter and exit the vehicle without being exposed to the hazardous materials. In addition to the vehicle's driver and commander, the rear cargo/personnel area was fitted with seating and workstations for four operators. On the roof of the upper hull was a "robotic miniature helicopter" (i.e. a
drone Drone most commonly refers to: * Drone (bee), a male bee, from an unfertilized egg * Unmanned aerial vehicle * Unmanned surface vehicle, watercraft * Unmanned underwater vehicle or underwater drone Drone, drones or The Drones may also refer to: ...
) fitted with stereoscopic cameras and environmental sensors, which was remotely controlled from inside the vehicle. In conceptual artwork the roof featured another transparent polycarbonate dome to provide external visual access to the operators, but this was not implemented on the actual vehicle. Only one prototype vehicle was built and is now on public display (repainted as a military ambulance) at Eagle Field in
California California is a U.S. state, state in the Western United States, located along the West Coast of the United States, Pacific Coast. With nearly 39.2million residents across a total area of approximately , it is the List of states and territori ...
.


Similar vehicles

* AIFV Command Post Vehicle (AIFV-B-CP) * LAV Command and Control Vehicle (LAV-C2) * M4 Command and Control Vehicle (M4 C2V) * M1130 Commander's Vehicle * YPR-765 PRCO-C Armored Command Post Vehicle


Notes


References

{{reflist Armored personnel carriers of the United States Tracked armoured personnel carriers