×
Aircraft / Aviation Vehicles & Artillery Small Arms Warships & Submarines Military Ranks Military Pay Chart (2024) Special Forces
HOME
NAVAL WARFARE INDEX
MODERN FLEETS
WARSHIPS BY COUNTRY
SHIPBUILDERS
COMPARE WARSHIPS
SHIPS BY CONFLICT
SHIPS BY TYPE
SHIPS BY DECADE
SHIPS BY CLASS
COLD WAR SHIPS
VIETNAM WAR SHIPS
Naval Warfare

Armored Troop Carrier (ATC)


Armored Troop Carrier / Riverine Assault [ 1969 ]



The Armored Troop Carrier bristled with heavy armament and was armored for the rigors of close-in fighting along Vietnam river shorelines.



Authored By: JR Potts, AUS 173d AB | Last Edited: 03/22/2021 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

VIEW SPECIFICATIONS [+]
The United States Navy, much like the French Navy before it during the First Indochina War, saw the importance of controlling and using the many streams and rivers of South Vietnam for war fighting and resupply. The purpose of the Armored Troop Carrier (or "ATC") was therefore twofold - first to move US Army and ARVN troops and, second, to service the fire team boats and other gasoline-powered watercraft on the rivers of Viet Nam. During a standard operation, troops were carried into battle in the Navy's ATCs, which were conventional landing craft, armored to safeguard against heavy fire they often were exposed to from canceled enemy positions onshore. These armored boats could carry a fully equipped infantrymen platoon of 40 men on any waterway with a depth of 5 feet or more.

The ATC boats converted from LCM-6 landing craft developed in the 1950s for ship-to-ship and ship-to-shore use. The converted LCM designs added 0.25 inch armor plating in many areas to protect the superstructure from critical damage caused by rockets. The upgraded armored ATC made up about half of the river craft deployed by the United States during the Vietnam War, in effect making the ATC the "workhorse" of the river war. Some ATCs had helicopter decks added and became ATC(H). These installations allowed helicopters to land on the boats themselves for swift evacuation of wounded soldiers. The Mobile Riverine Force (MRF) started with three basic boat types: (1) the ATC boat ("Tango Boat") - this served as the most useful boat; (2) the "Monitor", a floating artillery platform of the MRF and, (3) the Command and Communications Boat (CCB), the so-called "Charlie Boat". Each squadron of boats had a Tango boat converted into a boat for refueling to be used by all of the above.

The ATCs fuel capacity (using fuel oil or gasoline) was 1,200 gallons with space for 300 gallons of lube oil with a mixing tank holding 500 gallons. The boat was equipped with a portable tank and transfer pump that required hoses for the fuel exchange. The ATC full load displacement was 155,000 lbs with a cargo weight of 130,000 lbs. A sling was installed for hoisting fuel containers onboard. She maintained a semi-flat bottom with 2 x 6-cylinder diesel engines each having 225 horsepower at 2,100 rpm for emergency use and 165 horsepower at 1,800 rpm for continued use. ATCs fielded 2 x 24-inch D by 17-inch P by a 2-inch bore with a right-hand rotation propellers. The cargo well was 9'6" x 22'6" with a clear overhead and 9'6" x 31' 6" with a clear dock.

All Tango boats had a distinctive lowering bow ramp used to deploy troops and load cargo to and from shorelines. The ATC could provide close support against enemy fire due to a shield of hardened steel armor. The vessel could carry an arsenal of weapons that made her available for most defensive- and offensive-minded missions. ATCs were typically fitted with 4 x 7.62mm M60 general purpose machine guns and 2 x 12.7mm Browning M2 heavy machine guns, 1 x 40mm Mk 19 rapid-fire automatic grenade launchers and 2 x 20mm cannons, these protected in armored pill boxes. The crew of seven also carried their personal weapons and large supplies of ammunition was kept on board. If the Monitor river craft were considered the "battleships" of Vietnam rivers then the Tango ATC boats were the "heavy cruisers".

The Tango boats participated in a memorable chapter of the United States Navy's river warfare that was a hard fought effort for control of the "green" and "brown" waterways of the Republic of Vietnam. The US Army's Mobile Riverine Force used the ATC to transport the Riverine Infantry Force throughout the Mekong Delta. In the early part of the war, Tango boats mainly transported troops of the 9th Infantry Division. When the decision came down to integrate, Vietnamese Army and Marine troops replaced the Americans on these Tango boats.

The Viet Cong guerrillas operated on the river on a daily basis and this led to fierce gun battles at very close quarters. The guerrillas used a multitude of boats (called "junks" and "sampans") that were capable of navigating in only a few inches of water and could travel practically unseen and unheard near the banks of the rivers. However, also operating in these inland river areas was the joint Army and Navy Mobile Riverine Force. This force consisted of ATC's and heavily armed and armored monitors along with support boats that moved combat troops from the US Army's 9th Infantry Division into combat.

The ACT's were able to deploy troops on the flanks and to the rear of communist elements in an effort to defeat the enemy forces. After many years of war, the enemy had begun to find ways to counter the allied river patrol effort - the Viet Cong started using smaller rivers and canals to move their supplies. As such, the main force of the North Vietnamese Army and Viet Cong learned to avoid direct contact with the more powerful Mobile Riverine Force.

To secure the Mekong Delta in Vietnam, the American and Vietnamese river units fought well and hard against a tough Vietnamese communist enemy. In 1975 the Vietnam War ended in failure for the Republic of Vietnam and, by extension, the United States. However, the experience and brave work of the ATC crews, and that of her sister type ships, provided the military with valuable knowledge of riverine warfare for possible future application.©MilitaryFactory.com
Note: The above text is EXCLUSIVE to the site www.MilitaryFactory.com. It is the product of many hours of research and work made possible with the help of contributors, veterans, insiders, and topic specialists. If you happen upon this text anywhere else on the internet or in print, please let us know at MilitaryFactory AT gmail DOT com so that we may take appropriate action against the offender / offending site and continue to protect this original work.

Specifications



United States
Operators National flag of the United States
1969
Commissioned
United States
National Origin
Decommissioned, Out-of-Service
Project Status
7
Complement
Armored Troop Carrier - ATC
Hull Class
300
Number-in-Class
Not Applicable.
Ships-in-Class


Amphibious Assault
A shallow draught, and other qualities, give this vessel the ability to support amphibious assault operations close-to-shore.
Offshore Operation
Activities conducted near shorelines in support of allied activities.
Riverine
Activities conducted inland throughout rivers and connected waterways.


56.5 feet
(17.22 meters)
Length
17.5 feet
(5.33 meters)
Beam
3.3 feet
(1.01 meters)
Draught
77
tons
Displacement


2 x Detroit Diesel 64HN9 series diesel engines developing 220 horsepower each at 2,100rpm driving 1 x Shaft astern.
Propulsion
8.5 knots
(9.8 mph)
Surface Speed
1 knot = 1.15 mph; 1 nm = 1.15 mile; 1 nm = 1.85 km


FIRST GENERATION:
1 x 20mm automatic cannon (turreted).
2 x 12.7mm M2 Browning Heavy Machine Guns (HMGs).
4 x 7.62mm M60 General Purpose Machine Guns (GPMGs).
2 x 40mm Mk 18 Automatic Grenade Launchers (AGLs).
2 x 40mm M79 personal single-shot grenade launchers.

Also any crew-served personal weapons - hand grenades, pistols, service rifles, assault rifles, hand-held machine guns, and submachine guns as available.

SECOND GENERATION:
2 x 20mm cannons
2 x 12.7mm M2 Browning heavy machine guns
4 x 7.62mm M60 general purpose machine guns
1 x 40mm Mk 19 automatic grenade launcher
2 x 40mm M79 single-shot grenade launchers

Also any crew-served personal weapons - grenades, pistols, rifles, assault rifles and machine guns as available.


None.


Military lapel ribbon for the Cold War period
Military lapel ribbon for early warship designs
Military lapel ribbon for the Falklands War
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Korean War
Military lapel ribbon representing modern aircraft
Military lapel ribbon for the Attack on Pearl Harbor
Military lapel ribbon for the Russian Invasion of Ukraine
Military lapel ribbon for the Vietnam War
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2

Images



1 / 6
Image of the Armored Troop Carrier (ATC)
High-angled portside view of the Armored Troop Carrier; note turreted armament.
2 / 6
Image of the Armored Troop Carrier (ATC)
High-angled view of a group of Armored Troop Carrier boats at their floating harbor
3 / 6
Image of the Armored Troop Carrier (ATC)
An Armored Troop Carrier delivers its cargo in Vietnam
4 / 6
Image of the Armored Troop Carrier (ATC)
A convoy of Armored Troop Carriers heads out
5 / 6
Image of the Armored Troop Carrier (ATC)
A pair of Armored Troop Carriers hit the beaches in Vietnam
6 / 6
Image of the Armored Troop Carrier (ATC)
An Armored Troop Carrier sporting a helipad over its bow

Disclaimer | Privacy Policy | Cookies

2024 Military Pay Chart Military Ranks DoD Dictionary Conversion Calculators Military Alphabet Code Military Map Symbols

The "Military Factory" name and MilitaryFactory.com logo are registered ® U.S. trademarks protected by all applicable domestic and international intellectual property laws. All written content, illustrations, and photography are unique to this website (unless where indicated) and not for reuse/reproduction in any form. Material presented throughout this website is for historical and entertainment value only and should not to be construed as usable for hardware restoration, maintenance, or general operation. We do not sell any of the items showcased on this site. Please direct all other inquiries to militaryfactory AT gmail.com. No A.I. was used in the generation of this content; site is 100% curated by humans.

Part of a network of sites that includes GlobalFirepower, a data-driven property used in ranking the top military powers of the world, WDMMA.org (World Directory of Modern Military Aircraft), WDMMW.org (World Directory of Modern Military Warships), SR71blackbird.org, detailing the history of the world's most iconic spyplane, and MilitaryRibbons.info, cataloguing military medals and ribbons. Special Interest: RailRoad Junction, the locomotive encyclopedia.


©2023 www.MilitaryFactory.com • All Rights Reserved • Content ©2003-2023 (20yrs)