Potential Terrorist Threat Weapons

Regular readers know I have long been concerned that our cutters may not be adequately armed, if they are placed in a situation where they need to forcibly stop almost anything larger than a large cabin cruiser. It is not just that larger vessels are hard to sink. They may shoot back.

While I regard this as possible, but unlikely to occur in US waters (sort of like 9/11 was unlikely), it’s even more of concern, for countries with ongoing insurgencies, like the Philippines. Still, I don’t want to see the Coast Guard tested and found unprepared.

It becomes more likely to affect USCG personnel if they are overseas, doing counter piracy, doing counterinsurgency as we did in Vietnam, looking for weapons smugglers, or if we just stumble across terrorists enroute to their target and mistake them for drug smugglers. It also might be the work of an overconfident, vengeful drug lord.

In all probability, the situation will begin with an attempt to board a vessel of interest. It is probably most dangerous if they feign compliance, and the cutter comes close alongside. If the cutter sends a boarding party, it may be ambushed while they also attempt to disable the cutter. They would almost certainly make an effort to kill any exposed gunners.

That we might encounter small arms is a given, but I will look at other weapons, that might give them an edge, particularly if the cutter is surprised.

Any weapon that is man-portable, can be mounted on a pickup truck, or can be towed by one, can certainly be mounted on a vessel.

An aviation overwatch–fixed wing, helicopter, or UAV–could help us detect the presence of weapons, but it is not too hard to conceal weapons behind crates, in containers, or under canvas.

The most likely candidates are rocket propelled grenades, recoilless rifles/guns, heavy machine guns and autocannon, and Anti-Tank Guided Missiles (ATGM).

I will be using primarily Wikipedia and NavWeaps for reference. First, I will talk about the weapon type in general and then offer examples. Most of the examples are of Russian/Soviet or Chinese origin. They were chosen because these types seem very widely distributed and frequently fall into the hands of non-state actors.

Many of these weapons go back many decades, but that does not make them any less effective. Remember, we are still using the .50 caliber, a design that goes back to WWI.

As you go through the examples, I think you will see why I have advocated for weapons that can engage effectively from at least 4,000 yards.

Rocket Propelled Grenades:

From Wikipedia:

rocket-propelled grenade (often abbreviated RPG) is a shoulder-fired missile weapon that launches rockets equipped with an explosive warhead. Most RPGs can be carried by an individual soldier and are frequently used as anti-tank weapons. These warheads are affixed to a rocket motor which propels the RPG towards the target, and they are stabilized in flight with fins. Some types of RPG are reloadable with new rocket-propelled grenades, while others are single-use.”

These were initially designed as anti-tank weapons but there are warheads optimized for other targets as well. Reportedly fifteen different countries have made dozens of different weapons of this type.

An RPG missile found in Lebanon with a manufacturing symbol of the Iranian Army displayed by the IDF intelligence branch. Photo: Israeli Defense Force

The RPG-7

The ruggedness, simplicity, low cost, and effectiveness of the RPG-7 has made it the most widely used anti-armor weapon in the world. Currently around 40 countries use the weapon; it is manufactured in several variants by nine countries. It is popular with irregular and guerrilla forces. The RPG has been used in almost all conflicts across all continents since the mid-1960s from the Vietnam War to the ongoing Syrian Civil War.

Reportedly 9,000,000 of these have been produced. After the AK-47, it may be the most ubiquitous weapon in the world. A version is even made in the US. Different projectiles are available with different warheads. Projectile weight varies from 2 kg (4.4 pounds) for the fragmentation round to 4.5 kg (9.9 pounds) for those with a thermobaric warhead. Effective range is 300 meters or about 330 yards. Accuracy is affected significantly by crosswind.

The weapon has been used by ISIS and Al Qaeda.

Recoilless Rifles/Guns: 

recoilless riflerecoilless launcher or recoilless gun, sometimes abbreviated “RR” or “RCL” (for ReCoilLess) is a type of lightweight artillery system or man-portable launcher that is designed to eject some form of countermass such as propellant gas from the rear of the weapon at the moment of firing, creating forward thrust that counteracts most of the weapon’s recoil. This allows for the elimination of much of the heavy and bulky recoil-counteracting equipment of a conventional cannon as well as a thinner-walled barrel, and thus the launch of a relatively large projectile from a platform that would not be capable of handling the weight or recoil of a conventional gun of the same size. Technically, only devices that use spin-stabilized projectiles fired from a rifled barrel are recoilless rifles, while smoothbore variants (which can be fin-stabilized or unstabilized) are recoilless guns. This distinction is often lost, and both are often called recoilless rifles.

These weapons have generally been replaced by ATGMs except in the case of the Carl Gustaf, which is now being assigned, one to every US Marine infantry squad, and one to every US Army infantry platoon. Still, there are many of these weapons in circulation and they are commonly used mounted on the technicals of various non-state actors.

Forces belonging to the Iranian Navy using SPG-9. Velayat 94 Military exercise that held in February 2016 in the range of Strait of Hormuz and northern Indian Ocean. Tasmin News Agency.

The SPG-9:

“The SPG-9 Kopyo (Spear) is a tripod-mounted man-portable, 73 millimetre calibre recoilless gun developed by the Soviet Union. It fires fin-stabilised, rocket-assisted HE and HEAT projectiles similar to those fired by the 73 mm 2A28 Grom low pressure gun of the BMP-1 armored vehicle. It was accepted into service in 1962, replacing the B-10 recoilless rifle.”

Wight of the projectile is from 3.2 to 6.9 kg and range is reported up to 7500 meters, but effective range is 700 to 1300 meters. Rate of fire is 5-6 rounds per minute.

Heavy Machine Guns and Autocannon:

The modified pick-up truck, or “technical,” is a trademark of modern, unconventional warfare. Both rebels and government forces have used them extensively during the conflict. This one is carrying an anti-aircraft gun, ammunition, and petrol stored in plastic barrels. Photo Ajdabiya technical – Flickr – Al Jazeera English.jpg
Created: 23 April 2011

Moroccan ZPU-2, April 2006, Photo credit: Dieter Vogeler via Wikipedia

The ZPU-2 (more here) was developed as an antiaircraft mount and entered service in 1949. Projectile weight is 2.08 to 2.25 oz (64.0 gms), It has a range of 8,000 meters and an effective range of 1.4 km or about 1,500 yards (also reported as 2,400 yards). Each of its KPV heavy machine guns has a cyclical rate of fire of 600 rounds per minute and a practical rate of about 150 rpm.  “Muzzle energy of the KPV reaches 31 kJ (for comparison, the 12.7 mm Browning M2HB machine gun has 17 kJ…)” .

Reportedly, in 2007 ammunition for the weapon was still being produced in Bulgaria, Egypt, People’s Republic of China, Poland, Romania and Russia.

The ZU-23-2 was developed as an anti-aircraft gun, first deployed in 1960. It fires a 186 g (6.27 oz) projectile to an effective range of 2-2.5 km or 2200 to 2750 yards. The cyclical rate of fire is 2,000 rounds per minute, but the practical rate is 400 rpm. It is employed by over 70 users including Boko Harum.
“In the Soviet Union, some 140,000 units were produced. The ZU-23 has also been produced under licence by Bulgaria, Poland, Egypt and the People’s Republic of China.”

Soviet S-60 57 mm AA gun at Muzeyon Heyl ha-Avir, Hatzerim airbase, Israel. 2006. This gun was sold to 37 different countries during the Soviet era and has been used by “Islamic State of Iraq and the Levant.” Photo credit Bukvoed via Wikipedia.

The 57mm S-60 goes back to the World War II. The gun was manufactured in the USSR, China, Poland, and Hungary. Reportedly it is still used by 35 nations and was previously operated by many more.
The projectile weighs 6.17 lbs. Rate of fire is 120 rounds per minute cyclic, but 70 rpm sustained.
The Islamic State allegedly shot down a Cessna 208 Caravan operated by the Iraqi Air Force near Hawija, Iraq on 16 March 2016 with a truck-mounted S-60.
There are a huge number of Anti-Tank Guided Missiles (ATGM) available, any of which could ruin your entire day. “As of 2016, ATGMs were used by over 130 countries and many non-state actors around the world.” I’ll just talk about a couple.

9K111 Fagot in Polish service. Photo credit: Ministerstwo Obrony Narodowej

The missile weighs 12.5 kg (28 lbs) and the warhead is 1.7 kg or 3.7 lbs. It has an effective range of 70-2500 meters, about 77 to 2750 yards.
IDEF ’07, Baktar Shikan, original Wikipedia upload by KIZILSUNGUR at Turkish Wikipedia,1 June 2007.
The HJ-8 or Hongjian-8 (Chinese Red Arrow-8) and Bhaktar Shikan (Pakistani version) was developed in China. This tube-launched, optically tracked and wire-guided missile weighs 24.5 kg, has a range of up to 4,000 meters (one version reportedly 6,000 meters). It entered mass production in 1984 and has been operated by 21 countries and by non-state actors including ISIS. There is even a variant (HJ-8S) with an anti-ship warhead. Versions are also made in Pakistan and Sudan. Reportedly, in 2009, the Sri Lankan Army used these weapons against fast attack craft of the Tamil separatist LTTE’s Sea Tigers naval wing.

3 thoughts on “Potential Terrorist Threat Weapons

    • My opinion is that the weapons we have are not adequate. Currently we have eight National Security Cutters with 57mm guns and 20mm Phalanx CIWS working up to eleven-all based in three ports, 13 WMECs with 76mm guns. We are on our way to having 58 Webber class FRCs in US ports armed with 25mm Mk38 Mod2/3. The 14 WMEC210s and the few 110′ that have not yet been replaced are armed with the less accurate crew served 25mm Mk38. All other cutters are armed with nothing larger than .50 cal. The 25 OPCs are expected to be armed 57mm guns and Mk38 Mod2/3/4.

      That is probably quite adequate for routine drug enforcement, but it may not be enough to stop terrorists who are willing to die for a cause.

      The problem starts with the fact that we don’t have great Maritime Domain Awareness, so we are unlikely to recognize a threat vessel until it is relatively close. That means we would have very little time to call in assistance from other armed services or to reposition our own assets. Then there is the fact that as far as I can tell we don’t have non-Coast Guard military assets on standby around the country ready to respond to a maritime surface threat, particularly since we need to cover at least 31 critical ports. https://chuckhillscgblog.net/2020/09/02/a-reevaluation-ruminating-on-homeports-while-playing-the-red-cell-part-2/

      Then assuming we detect the threat an hour or two before the attack begins, we are unlike to have any of the NSCs or WMECs underway and in the vicinity.

      Available assets are likely to be Webber class FRCs or WPBs. If you look at the post, you can see, they are relatively easily outgunned. They certainly are not armed to forcibly stop anything of more than about 100 tons.

      Even if an NSC, 210 or OPC were able to intercept, our guns are not really adequate to reliably forcibly stop a medium to large ship. https://chuckhillscgblog.net/2011/03/14/what-does-it-take-to-sink-a-ship/

  1. Another potential adversary weapon I was not aware of, an automatic mortar that can fire 100 or more rounds per minute. https://en.wikipedia.org/wiki/2B9_Vasilek
    An improved version is also made by the Chinese,

    “The SM-4 can shoot a 5.7-kilogram projectile out to eight kilometers, compared to the W99/Vasilek which can only shoot a 4.4-kilogram projectile to about four kilometers. The fire-control system is also vastly improved. First-hit chance is increased, and a laser rangefinder is provided for direct-fire missions. Both daytime and low-light optics are present for direct fire. Unlike the Vasilek in Soviet/Russian service, which was primarily operated as a towed gun, the Chinese have integrated the SM-4 into vehicles as the primary platform. They are mounted on a variety of light tactical vehicles, but the Dongfeng EQ-2050 4×4 vehicle (a.k.a. the Chinese Humvee) seems to be the most common. The SM-4 is rumored to be deployed with mountain and airborne units of the People’s Liberation Army.” https://nationalinterest.org/blog/reboot/why-china%E2%80%99s-mortars-are-arms-control-nightmare-194158

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