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Just Add, Umm, Water

An anonymous reader writes "The US military has devised a way to ensure its troops in battle need never go hungry - with dried food that can be rehydrated using dirty water or urine. Bleh, but lightweight bleh." The original New Scientist story is available too.

5 of 496 comments (clear)

  1. Weird by Real+Troll+Talk · · Score: 4, Informative

    "Engineer Ed Beaudry was quoted by the New Scientist as saying that the body would not find using urine to rehydrate food toxic in the short term, but in the long term it would cause kidney damage."

    I think I'd rather steal food from natives than eat US Amry-supplied kidney damaging "food".

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  2. Re:Water by Effugas · · Score: 4, Informative

    Here, lets talk in some geek terms.

    You know how the more fuel a rocket has, the more fuel it needs, due to the additional weight of that fuel? Understand how most of the fuel is ultimately spent in complete waste, as it's just carrying itself?

    Kind of the same with water. Water is HEAVY -- seven pounds a gallon. We blow quite a bit of it just dragging it around -- and don't worry, it provides all of no calories; it's useful as a catalyst and a cooler, but not as a fuel. Almost all the water we consume is just excreted back out, pretty clean too (urine is one of the purer substances to leave the body). It's be pretty useful to be able to fully filter the stuff and reintroduce it to our food. Perfectly efficient, no, but would you rather lug around 50 pounds of water?

    --Dan

  3. Re:MREs and dirty water by Rosco+P.+Coltrane · · Score: 4, Informative

    MREs are certainly not haute cousine.

    *US* MREs are not haute cuisine. French MRE are actually incredibly tasty: they come packaged with a single-use heater kit that you assemble under the can and light up, it cooks in about 5 minutes and once it's done, it really is yummy.

    There's a good reason why US military personels were dying to trade all kinds of hardware for rations with the (few) French soldiers in Iraq during Gulf War I.

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  4. Re:MREs and dirty water by afidel · · Score: 4, Informative

    MRE's are SO much better than C or worse yet K rations that it's not even funny. Hell MRE's are better than a lot of the civilian dehydrated foods I eat while mountaineering (they have a lot less packaging so more food per ounce). If I had to I would piss in a canteen and use my Pur Scout on it to hydrate food, hell I HAVE done just that =)

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  5. Re:Tooth to tail? by swillden · · Score: 5, Informative

    Could you explain this "tooth to tail ratio"?

    Sure. The tooth is the part that bites, and the tail is the part that drags behind. The tooth of a military force is the combat force, the actual fighting soldiers and their equipment. They're the people who actually push the enemy around and force the conclusion of the conflict. The logistical tail is the rest of the force, which exists to support the tooth and make sure it has everything it needs to fight effectively. Modern, mechanized military forces require incredible amounts of support. Ammunition, fuel, food, spare parts, intelligence, mail, etc., it takes a lot to keep them fully supplied, but they're also very fast and very hard-hitting when they're well-supplied.

    However, while the tail is so crucial to the effectiveness of the tooth, it's also a liability itself. If the tooth is concentrated on taking the fight to the enemy, it can't focus on protecting the tail, which may leave the tail vulnerable to attack. Successful attacks on the supply lines leave the combat soldiers without supplies, dramatically reducing their effectiveness. The longer the tail, the easier it is to cut. Also, while well-supplied modern forces are highly mobile, the logistics chain is not, and the larger the tail, the more sluggishly it moves. This leads to situations where the combat forces can easily outrun their own supplies, effectively cutting themselves off. Last, all of the people and equipment who make up the tail cost just about as much money as the combat forces, but don't directly contribute to shoving the enemy around. The tail appears to offer no "bang" but costs a lot of bucks so for a given budget, a combat force that requires a smaller logistical tail is a larger, more powerful force.

    The tooth to tail ratio, then, is a measure of how much of the force is dedicated to fighting vs support.

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