Author Topic: Night Vision  (Read 1919 times)

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Offline icrcc

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Night Vision
« on: January 13, 2015, 01:48:26 PM »
I received this article in an email from The Survival Summit: thesurvivalsummit.com it was provided by Infidel Body Armor: https://infidelbodyarmor.com. I thought it might be of general interest.

 
 
Combating Night Vision
In the current wars, we (the Coalition Forces) enjoy an immensely superior technological advantage.  Helicopters, jets, communications, satellites, drones,night vision, thermal imaging, etc.  Despite all of this, the enemy seems to be getting along fairly well.  Political and Rules of Engagement constraints aside, why, despite our technological advantages, aren’t we cleaning up like we’d anticipated?

That’s a thesis question for a War College grad student and I won’t be answering it completely in this article.  But I will address a portion of that answer.  In short, the enemy has been able (in some degree) to exploit the weaknesses of our technology, of which we have become over reliant.
 
Here’s an example based on night vision like the PVS-7 or PVS-14 that is commonly used by soldiers and is now becoming much more used by civilians due to the drop in prices.  The PVS-7 and 14 are light intensifiers which amplify light and feed it to a sensor similar to that of a digital camera, which then displays the enhanced image on a screen.  They are sometimes referred to as NODs (Night Optical Devices), NVGs (Night Vision Goggles), or NVDs (Night Vision Devices).  For clarification, I’m not talking about thermal devices.

When you are using NODs, you gain a super-human power!  The ability to see in near darkness.  You’re able to navigate through rough terrain, see things that no one else can see, you can avoid danger, observe your target from afar when they can’t even see 2 feet in front of themselves!  Quickly, you come to rely on your superpower and may neglect your regular senses, including common sense.
 
Common sense in a war zone includes using cover and concealment, noise discipline, etc.  These things often get neglected when a person feels they areinvisible to their enemy.

As awesome as this device is, it has weaknesses.  Remember that it only amplifies light- it doesn’t actually allow you to see in absolute darkness.  Shadows are still there- though without NVGs you may have a tough time spotting them.  The light from the moon and stars- even while faint- casts shadows from trees, buildings, and people.

The device also doesn’t allow you to see through objects.  Trees, logs, leaves, buildings, and cars offer concealment against NVGs.

Camouflage clothing (for the most part) works against NVGs.  Avoid hunting clothing like Real Tree or Mossy Oak as it actually is worse than just blue jeans (in my testing).  Military camo like Woodland and Multicam work very well against night vision devices.  Avoid wearing black clothing as it actually is more detectable than other colors.

Additionally, infrared light, while invisible to the human eye is detected and amplified by NODs.  Because of this, often infrared flashlights and lasers are used by NOD users when they don’t believe that the enemy also has them.  If the enemy also has NODs, then using those infrared flashlights and lasers just acts to give away the location of the person using them.

So, how do you defeat a person using NVGs? First, begin by understanding your enemy and the equipment he uses.  This is part of the IPB process or Information Preparation of the Battlefield.  For example, you’d want to know if your enemy is known to use NODs or not (and what kind).  Second, give yourself every advantage in the fight.  If you can get a set of NVGs, then get them and use them!  Third, exploit the weaknesses of the human using them; and fourth, exploit the weaknesses of the device.

Consider these tactics:
•   Use shadows for concealment: Do you know where the moon or other light is in relation to where you’re crouched (are you on the wrong side of the tree?).
•   Are you wearing camouflage? Facepaint? Hat? Face veil?
•   Are you moving as quietly as possible and stopping often to listen for enemy movement?  Smells? Movement?
•   Do not use any light source, including fires.  If you must use a flashlight, do so under a poncho or blanket.  This includes smoking.
•   Are you using as much cover and concealment (cover is better) as possible while both stationary and when moving?
•   If your enemy uses NODs, and you do not, avoid contact at night if possible.  Fight on your terms, not when they have the advantage.
•   If your enemy uses NODs, and you do too, avoid using infrared flashlights and lasers.  Conversely, look for signs that your enemy isusing them.

What doesn’t work: Shining a light at the enemy, wearing tin foil or mylar blankets, wearing all black, wearing all green, lighting lots of fires, etc.  These tactics don’t work and will get you seen faster than if you just laid still.
 
 
It may never happen. Best to be prepared just in case.

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Offline Quietman

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Re: Night Vision
« Reply #1 on: June 10, 2015, 12:26:33 AM »
Nail hits head again icrcc.
Another thing to do if possible is use decoys and drags.
Decoys can be a few glow in the dark golf balls, glow sticks or expendable flashlights which can be used to get attention away from you. Anything that gets the attention of the device. left beside or under things the person with the lookums will go towards that first.
Drags are anything which can be moved by a string, fishing line, slingshot etc to make noise and or motion where you have just been, therefore directing attention in the opposite direction you need or want to go. Make sure they can't find the string or a trail it leaves when you pull.
 
As in all cases of cover and concealment, birds and animals will give you up before anything else.
 
Oh yah... ghillie suits are awsome until they are tangled in a rosebush, fence or other grabby things.
Insert angry grumbling here...

Offline GrouchyPrepper

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Re: Night Vision
« Reply #2 on: June 10, 2015, 08:49:11 AM »
sort of off topic kind of.
would a mylar blanket work against  thermal devices?
my guess is it would.
I like thermal devices from what I have seen on the net over night vision. (have no practical experience with either)
friend has a night vision scope gen1 not all that impressed.



Offline JustABear

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Re: Night Vision
« Reply #3 on: June 10, 2015, 09:25:44 AM »
Hey Grouchy. I would think that a thermal blanket would work to some degree so long as it wasn't touching you. That is if it was suspended over or around you in some way. That way it would be reflecting the radiant heat back to you and not allowing it 'out' into the world to be seen. If it has physical contact with you it would then warm up to your temperature and project that heat signature onward. Just theory but I think it has validity as heat transfers in 3 ways, radiation, conduction and convection. It would be even better if you had a blanket over you, then the thermal blanket, layers, and neither one actually touching you.
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Offline Quietman

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Re: Night Vision
« Reply #4 on: June 11, 2015, 01:26:01 AM »
On the wish list only a few lines below the winning lottery ticket is Gen 3 or 4 Night Vision headset and rifle scope, then thermal devices found at Cabela's etc for $400+, rifle scope for $3500.00.
For now Gen 1 monocular and rifle scope are available at many stores even Canadian Tire.
 
Insert angry grumbling here...

Offline Mountainman

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Re: Night Vision
« Reply #5 on: August 23, 2015, 06:13:55 PM »
All,

An observation from the field.......understand that NOD's provide a 2 dimensional image. When used for night-time observation of unknown ground, you need to have a laser range finder mounted on your NOD. Why, you may ask......if you discover signatures that "could" be guns, tanks, troops, etc but you do not know how far away they are you can be fooled - false positive sighting. You need to know what scale/size the signature is in relation to your position. Such as, if you rolling into a position in the dark and you "detect" positve signatures of enemy "tanks".....you can see the barrels, the bulk of the machine and signatures of the engines......it looks like they are 2000 metres away. However, in the morning with the aid of daylight you discover, that the objects are not 2000m, they are 250m and it is a pile of stumps and timbers, burned partial a season before, but the charred stumps retain lots of heat through the night and the bare timbers, not so charred are much cooler. But, without a means to measure the distance in the dark, this could have lead to an international incident and an arty strike called in on a pile of stumps......LOL. Just an example of high technology.

MM.