Title: Anti-diver grenade
Description: to foil terrorists
Description: to foil terrorists
Wushu - September 27, 2005 09:38 AM (GMT)
a good anti-terror weapon for the coastguard to develop.... maybe it can even use dotc funds? :thumb:
Thursday, 15 September, 2005
Anti-diver grenade to foil terrorists
To counter threats posed to warships at anchor close to the coast or within a harbour, Bulgaria’s Arcus company has developed the AR 476 ‘Azimuth’ anti-diver grenade. This 40x46mm grenade has been designed for use with M203 or M79 launchers and is said to be effective against enemy divers in water to a depth of 22m and within a projected range of up to 400m.
Featured on Stand 1201, the Azimuth grenade has a delayed action fuze that includes self-destruction within 17 to 22 seconds after firing if there is no explosion after impact. In fact in water the fuze delays action for around three seconds, after which the explosion of a powerful RDX composition creates overpressure ensuring a lethal effect within a radius of 10m.
The grenade is safe in storage and has a shelf life of 10 years.
--------------------------------------------------------------------------------
© 2005 Jane's Information Group. All rights reserved
Thursday, 15 September, 2005
Anti-diver grenade to foil terrorists
To counter threats posed to warships at anchor close to the coast or within a harbour, Bulgaria’s Arcus company has developed the AR 476 ‘Azimuth’ anti-diver grenade. This 40x46mm grenade has been designed for use with M203 or M79 launchers and is said to be effective against enemy divers in water to a depth of 22m and within a projected range of up to 400m.
Featured on Stand 1201, the Azimuth grenade has a delayed action fuze that includes self-destruction within 17 to 22 seconds after firing if there is no explosion after impact. In fact in water the fuze delays action for around three seconds, after which the explosion of a powerful RDX composition creates overpressure ensuring a lethal effect within a radius of 10m.
The grenade is safe in storage and has a shelf life of 10 years.
--------------------------------------------------------------------------------
© 2005 Jane's Information Group. All rights reserved
saver111 - September 27, 2005 11:19 AM (GMT)
O ayan! Simply pa iyan.
Wushu, can you change the title to anti-diver grenades for easy browsing? :thumb:
Wushu - September 27, 2005 11:49 AM (GMT)
ngek, oo nga no hehehehe :drunk:
pioneering din pala mga pinoy sa "undersea warfare" hehehehe
di ko alam mag-change ng title e, hamak na poster lang ako dito......
pioneering din pala mga pinoy sa "undersea warfare" hehehehe
di ko alam mag-change ng title e, hamak na poster lang ako dito......
ctrlaltdel - October 3, 2005 04:41 AM (GMT)
tama si saver! expert tayo sa illegal dynamite fishing e terrorist pa kaya? :thumb:
Lorenz_Mallari - July 30, 2007 11:49 AM (GMT)
| QUOTE (ctrlaltdel @ Oct 3 2005, 12:41 PM) |
| tama si saver! expert tayo sa illegal dynamite fishing e terrorist pa kaya? :thumb: |
:thumb:
saver111 - November 12, 2008 07:13 AM (GMT)
Navy's New Swimmer-Smacking Grenade
By David Hambling EmailNovember 26, 2007 | 1:31:00 PMCategories: Ammo and Munitions, Bizarro
Swimmer_grenade
A while back, someone noticed that a vast number of US assets -- from ships to pipelines and port facilities -- were vulnerable to attack by divers. DANGER ROOM has looked at a whole range of concepts for dealing with them, from underwater acoustic weapons to (alleged) killer dolphins -- not to mention scuba-diving guards armed with exotic underwater firearms , or bang sticks or even shark darts. But the basic technique for tackling hostile divers has not changed much over the years: you toss in a grenade.
Shockwaves propagate much more effectively through water than through air, so blast can stun or kill at much greater ranges. But someone decided it was time for an upgrade.
The Navy recently put out this press release describing their new Anti-Swimmer Grenade, which will replace the obsolete Mk3A2 concussion grenades previously used for this role:
“The MK3 grenades currently being used,” Gabriel Soto explained, “are not very effective. They only have a four-to-five-second delay before detonation, which means they don’t get very deep.” And they can pose a threat to the user as well, he said. Since they do not have built-in safe-arm features, once the pin is pulled and the lever released, they detonate in four to five seconds.
The ASG meets the basic requirements in the Coast Guard memorandum—and then some. The user sets its detonation depth in 10-foot increments from 10 to 100 feet, and it uses state-of-the-art missile safe-arm technology that won’t allow it to detonate unless certain criteria are met.
The ASG uses battery power and a sequence of fail-safe checks of timers and a depth pressure sensor to fire an exploding foil initiator that initiates a booster and main charge. Before the actuating pin is pulled, the fuze power inputs are physically disconnected from the battery terminals and shorted together. The pin cannot be pulled until the operator rotates the detonation depth dial. Once the pin is pulled, the ASG must sense that it is in a water-pressure environment before it will fire. If it does not sense this environment after a certain period of time, it will render itself safe.
… The ASG also packs three times the explosive mass of the MK3A2. Preliminary testing indicated that it significantly extends the effective depth and range. The project has passed an initial “own-boat” hazard test in which a main charge was detonated underwater at the minimum safe-separation depth.
Swimmer_grenade_2Meanwhile, Ares reports that Rheinmetall are working on their portable depth charge, which comes in two flavors: an 800g 'signal' grenade and a 1.4 kg killer version.
Back in the old days, they did not rely on fancy technology for this job, just a lot of explosive. Sometimes an unbelievable amount, as this account (complete with photos) of life on a floating base in Vietnam recalls. The threat from saboteurs known as 'swimmer zappers' planting explosives meant that extreme measures were needed:
The floating logs and mooring buoy were part of an anti Vietnam sapper/swimmer razor wire net that we designed to discourage the VC "indians" from swimming in and planting charges. They still tried six times…all unsuccessfully. However, the CIA guys brought a VC "chu how" guy over one day and he described a successful "dry run" he had done. We "prophilacitcally" threw quarter-pound pound TNT depth charges in the water from two ends of the base at a random rate of about ten per hour.
Needless to say there were not too many fishes around…. We went through about ten thousand depth charges each month. I went to sleep listening to the comforting sound of explosions.
http://blog.wired.com/defense/2007/11/index.html
By David Hambling EmailNovember 26, 2007 | 1:31:00 PMCategories: Ammo and Munitions, Bizarro
Swimmer_grenade
A while back, someone noticed that a vast number of US assets -- from ships to pipelines and port facilities -- were vulnerable to attack by divers. DANGER ROOM has looked at a whole range of concepts for dealing with them, from underwater acoustic weapons to (alleged) killer dolphins -- not to mention scuba-diving guards armed with exotic underwater firearms , or bang sticks or even shark darts. But the basic technique for tackling hostile divers has not changed much over the years: you toss in a grenade.
Shockwaves propagate much more effectively through water than through air, so blast can stun or kill at much greater ranges. But someone decided it was time for an upgrade.
The Navy recently put out this press release describing their new Anti-Swimmer Grenade, which will replace the obsolete Mk3A2 concussion grenades previously used for this role:
“The MK3 grenades currently being used,” Gabriel Soto explained, “are not very effective. They only have a four-to-five-second delay before detonation, which means they don’t get very deep.” And they can pose a threat to the user as well, he said. Since they do not have built-in safe-arm features, once the pin is pulled and the lever released, they detonate in four to five seconds.
The ASG meets the basic requirements in the Coast Guard memorandum—and then some. The user sets its detonation depth in 10-foot increments from 10 to 100 feet, and it uses state-of-the-art missile safe-arm technology that won’t allow it to detonate unless certain criteria are met.
The ASG uses battery power and a sequence of fail-safe checks of timers and a depth pressure sensor to fire an exploding foil initiator that initiates a booster and main charge. Before the actuating pin is pulled, the fuze power inputs are physically disconnected from the battery terminals and shorted together. The pin cannot be pulled until the operator rotates the detonation depth dial. Once the pin is pulled, the ASG must sense that it is in a water-pressure environment before it will fire. If it does not sense this environment after a certain period of time, it will render itself safe.
… The ASG also packs three times the explosive mass of the MK3A2. Preliminary testing indicated that it significantly extends the effective depth and range. The project has passed an initial “own-boat” hazard test in which a main charge was detonated underwater at the minimum safe-separation depth.
Swimmer_grenade_2Meanwhile, Ares reports that Rheinmetall are working on their portable depth charge, which comes in two flavors: an 800g 'signal' grenade and a 1.4 kg killer version.
Back in the old days, they did not rely on fancy technology for this job, just a lot of explosive. Sometimes an unbelievable amount, as this account (complete with photos) of life on a floating base in Vietnam recalls. The threat from saboteurs known as 'swimmer zappers' planting explosives meant that extreme measures were needed:
The floating logs and mooring buoy were part of an anti Vietnam sapper/swimmer razor wire net that we designed to discourage the VC "indians" from swimming in and planting charges. They still tried six times…all unsuccessfully. However, the CIA guys brought a VC "chu how" guy over one day and he described a successful "dry run" he had done. We "prophilacitcally" threw quarter-pound pound TNT depth charges in the water from two ends of the base at a random rate of about ten per hour.
Needless to say there were not too many fishes around…. We went through about ten thousand depth charges each month. I went to sleep listening to the comforting sound of explosions.
http://blog.wired.com/defense/2007/11/index.html