The Swarming Boat Problem –What Does it Mean? (A threat to our Navy)

Technology and Security ^ | Feb 12 2012 | Stephen Bryen

[Ooh-Ah]

The US Navy has been concerned for some time about the threat of “swarming” boats. This threat is seen as very strong where American warships go through narrow passageways like the Strait of Hormuz, or around important anchorages, as for example near key oil ports.

The swarming boat thesis is that terrorist, whether directly or indirectly state sponsored (i.e., Hezbollah, al-Qaeda) will load up a number of small boats with high explosives and drive them toward US warships at relatively high speed. These boats, which just need a couple of high powered outboard motors, can move very fast. Because they are made out of fiberglass and do not protrude far above the waterline, they are hard to see, hard to catch on radar, and hard to shoot at because they expose very little surface.

A terrorist suicide boat from Sri Lanka

A swarming boat attack can be a suicide attack, or it can be an attack where the boat driver jumps out at the last minute. Or, in a more sophisticated version, the swarming boats can be remote controlled.

Swarming boats can be launched from shore at night, or they can be dropped into the water from old transport ships or empty, obsolete oil tankers.

Multiple boats coming at a US Naval ships present a problem, because it is unlikely that the ship’s missiles can hit these targets. This leaves only the guns on the ship to do the job.

American ships today are significantly under-gunned. During the 80′s Pentagon planners were focused on “big” naval threats like the Soviet Union. Ships needed missiles to fire, guns were thought to be obsolete.

Most US warships have a CIWS gun (pronounced Sea-Wiz). This is a 20mm Gatling gun that was put on ships to take on any enemy missile that got through past the missile defense on the ship. CIWS fires a lot of rounds very rapidly, but it also runs out of ammunition just as fast. It is a short range gun, but probably will not be very effective against multiple swarming boats coming in from different angles of attack. CIWS was only used once in 1991 against an Iraqi Silkworm missile. It missed its target but managed to hit one of its nearby sister ships. Another CIWS, belonging to the Japanese Navy, shot down a US A-6 Intruder aircraft, when it was supposed to hit a target drone towed by the A-6.

The US Navy had a program to integrate the CIWS gun with the Oto Melara 76mm Compact 75 on US frigates. The project, called Swarmbuster, does not seem to have been completed. The Compact 75 is a long range 3 inch gun that is effective in the counter-ship counter-boat role. It also has ammunition with sufficient burst to blow a swarming boat out of the water. Improved versions of the Oto gun fire 100 rounds per minute or better. It can use the same sensor as the CIWS gun.

The US Navy is right to be worried about the swarming boat problem. On the other hand, the Navy is not very well prepared to deal with the threat, particularly if the enemy strikes at night. One wonders why, despite the depth of concern and the years the Navy has had to deal with the threat, very little (if anything) has been done to build proper countermeasures.

Iranian Mini-Subs Another Threat to US Navy ships

[headstamp 2]

Time to go back to the 50 cal. Quad mounts.

[oldsalt]

I can recall being on board Enterprise on Yankee Station in '66 and watching the sunrise ...and looking at all junks and small boats crowded all around us. We were fairly close inshore,the North Vietnamese coast was a smudge on the horizon.

Those junks were supposedly fishing,but were really there to sound off when we launched a strike. Our defense against them wasn't there until they welded some .50 cal mounts on the catwalks all around the flight deck. The only high-speed contacts I remember were one early AM blips that sent us to GQ. Six high speed surface contacts were eliminated by diverting an A-6 Intruder from an en route night strike inland to the area of the contacts...which disappeared after a dump of maybe 22 bombs on their position.

Then point is you make do with what you've got or improvise.

[Angry_White_Man_Syndrome]

Those 4 gun mounts can be fitted with much more that 7.62.

[Nervous Tick]

>> One wonders why, despite the depth of concern and the years the Navy has had to deal with the threat, very little (if anything) has been done to build proper countermeasures.

Let me just take a wild stab at this one: Because we promote to leadership positions admirals whose main ambition is to see that our submarines are “manned” entirely by lesbian “sailors”?

[meatloaf]

I would hope we’re smart enough to keep the our carriers out of range of small boats. That doesn’t mean we couldn’t be surprised by a bunch towed far out to sea beyond their expected range. If pirates do that, Iran certainly can. Unfortunately, Israel is the wild card. With us mostly out of Iraq, they have an easier route to Iran. We could end up being bystanders who take a hit after Israel attacks Iran’s nuclear facilities. I don’t expect us to escape taking a hit. I’ve said before I wouldn’t be surprised if we lose a carrier. There’s too much fuel and ordinance to not suffer serious damage and even a loss.

[Eldon Tyrell]

http://www.baesystems.com/ProductsServices/bae_prod_bofors_mm_mk_three.html

Yup -

For exactly this purpose. Demos are awesome.

The article is kind of silly - talking about the gattling gun.

[Thrownatbirth]

The old Terrier SAMs worked very well against small surface targets. We took out a 30 degree swath of rubber boats at 5-6 miles during a MISSILEX.

Kind of a scary flight profile though. It looked like it was arcing right back at you.

[RedMDer]

We have an election coming and FR must be up and running and healthy if we are going to make a difference. All contributions are for the Current Quarter Expenses. In other words, FR could go away if the expenses for this quarter are not met. Where would you go? Click here or mail checks to: Free Republic, LLC - PO Box 9771 - Fresno, CA 93794

We have an election coming and FR must be up and running and healthy if we are going to make a difference. All contributions are for the Current Quarter Expenses. In other words, FR could go away if the expenses for this quarter are not met. Where would you go? Click here or mail checks to: Free Republic, LLC - PO Box 9771 - Fresno, CA 93794

[Last Dakotan]

Because we promote to leadership positions admirals whose main ambition is to see that our submarines are “manned” entirely by lesbian “sailors”?

Yeah, and cower in fear when female Senators question whether they should receive their pensions.

[PapaBear3625]

Those 4 gun mounts can be fitted with much more that 7.62.

Yes, they can be fitted with .50 and 40mm grenade launchers, but at 3,000 rounds per minute, the 7.62 mini gun will shred a speed boat quite nicely. The tracer stream also makes it easier to guide onto the target from a moving boat.

[Angry_White_Man_Syndrome]

Yes, but with a max effective range of 2000 meters compared to 1000 for the 7.62 a 50 cal is the way to go. This even more important when dealing with suicide mission targets. Now having 7.62 ready if they get past you outer line is good but nothing compares to the stopping power and range of a 50 cal on a small boat.

[PapaBear3625]

You have higher confidence than I do about the ability of a sailor on a moving, bouncing boat to hit a dodging speedboat at 2,000 meters using a non-gyro-stabilized gun. Our sailors are really good, I’m not sure they are that good.

[PapaBear3625]

One thing I might like to see on our patrol boats, for use against speedboats: TOW missiles with gyro-stabilized computer-assisted sights.

[Pilsner]

Normally they’re well offshore where little craft like this wouldn’t venture, right?

In narrow water ways, there is no "well offshore." Our warships will be threading their way civilian shipping, including trading, fishing and pleasure vessels of all kinds, a lot off it making short trips along the Gulf coast, or across it. If the Navy knows in advance when, and where,the Iranians will attack, I don't doubt that our aircraft and helicopters could easily destroy Iranian fast boats by the hundred. But I also think it is preposterous to think that the lack of guns on our warships isn't a big deal, because we have enough helicopters to give all of our warships 360° protection, 24-7.

[newnhdad]

all they need is one. There is no defense against a swarm attack of a few dozen smaller craft and probably a few dozen missiles launched at the same time. If we know this, they know this. Imagine what losing a carrier would do to our Navy. A Navy already tasked with reducing forces.
It will only take one hit for Obama to withdraw from the region. He’s just looking for an excuse to make gas $10 gallon so his Voltswagon will finally sell.

[nascarnation]

One of my buddies is a Captain in the USNR. I’ll see what he thinks.

[Angry_White_Man_Syndrome]

I was in the Special Boat units when we did the acceptance trials on these boats. One of the criteria was the ability to launch Stinger, surface to air missles. I don’t think a TOW would be much more difficult.

[PapaBear3625]

How did you find the platform, as far as being able to hit something at long range with a machinegun?

One thing about TOW is that you need to keep the sights centered on the target to guide the missile to it, which is why I was talking about mounting some sort of gyro-stabilized platform for the sights (with the user able to control the thing from inside the boat while looking at the target on a display).

[PapaBear3625]

PS: thank you for your service!

[Angry_White_Man_Syndrome]

The boat is actually a lot more stable then you might think. A good driver can make it a pretty steady ride especially in the shallow waters where they operate. We had plenty of range time shooting 3’ dia targets out by San Clemente Island. I could usually get on target within 10 to 20 rounds with 7.62 at 500 to 600 yards.