Tritium has a half life of 12-13 years. While not difficult for an experienced user, someone who is used to setting declination and forgetting it thereafter will have to be reminded occasionally to make the proper adjustment in sighting. Put simply, night sights glow in the dark. I had my GPS also, but buried itin my pack to prevent cheating. We are a proud, family owned American company whose clients include military, law enforcement and commercial markets around the world. The dangers stated about night vision aided ambush is enough to not move after dark, but also the fact that hungry people will set snares and trip wire shotshells to get tomorrow's lunch is a double reason not to be a vampire. +10 The second one I bought I used for all types of activities. The baseplate was broken from a few drops, while the Cammenga was with us throughout the walks and has helped us back to the main camp. 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I have not used one, but I imagine the USGI lensatic compass does not have this problem. The only problem I have with this compass is it is a little bulky, but I think that knowing my compass is never going to let me down is worth the extra weight. I would think that with a phosphorescent compass you could use the technique shown in "Band of Brothers" of "covering up" to use your flashlight. Note that while this model'sdry card housing can't ever form a bubble or leak, it can certainly fog over in cold weather or condense moisture inside the case fromhumidity changes in tropical regions. Take that as a plus or minus, depending on your perspective. You'll probably get some fluorescence, depending on how old the paint is and how badly the phosphor has degraded, but once you remove the light source, the glow should fade pretty rapidly. 4.6 out of 5 . As the U.S. Militarys official compass manufacturer, Cammengas Tritium Lensatic Compasses have proven themselves repeatedly in almost every kind of environment and situation. This compass is built like a tank. July 15, 2019. 4 years old with the case and a map reading land nav field manual. Compass is approved for the Japanese Market. Extensive hiking and hunting using topo maps. Sandproof for extra durability. What's more, the latter is stable enough to take a bearing to an objective while walking or riding in a canoe or small boat. Just a word of caution. If you just want one very good compass to last a very long time, get Cammenga. +14 Folks in avalanche country might like this. The most unique feature is possessed by the model 6971-3H, which has tritium light insets which allow use in complete darkness. The sighting lens recently fell out, however. The lensatic compass is used by those in the U.S. Armed Forces. Cammenga is very rugged and can stand all abuses we had during our lost. Rest easy and travel safely. The compassusesmagnetic 'induction dampening' instead of the more common liquid dampening used in many baseplate compasses, which is advertised as an advantage (no way to form air bubbles or leak). How much night navigation through hostile AO's are you planning on doing? mike068 The Model 27 is phosphorescent and will need to be replenished every few hours by a light source but it will never stop working and is significantly cheaper than its 3HC counterpart but will do the job just as well and as accurate. It too is 5 stars. If I were in the market for a new compass today, I. Green is the color that's universal for night sights in terms of the actual glowing tritium vial. If I lived in the Rocky Mountains, I could probably find a use for it. ANDERSON, LEIBER, CHANDLER and SCIENCE FICTION THE WHITE KING'S WAR by Pool Anderson STARHUNGER by Jack Wodhams WHEN THEY OPENLY WALK by Fritz Leiber > - \ THE MINUS I EFFECT f' First, off it was like coming home again. Price Paid: $50, Reviewed by model B3H at $99.95. Some compasses are set up differently. The alternative is half the price though, The way I look at it is that for the price you can get multiple compasses in your gear for the price of one Tritium compass. Silva Polaris Compass; 2.5 6. The GI version has Tritium (glow) markers. Some come with intentionally dimmer rears. 4.6 out of 5 stars. NIGHT FISION TRITIUM NIGHT SIGHTS FOR GLOCK. December 27, 2009. Battle tested through rigorous shock, water, sand proof, and functional . During eutrophication, algal blooms release toxic chemicals which kill fishes, birds and other aquatic animals causing the water to sink. The compass itself is built with attention to detail and all parts on my example were well-fitted with no signs of manufacturing or assembly defects. Purchasing a genuine CAMMENGA LENSATIC COMPASS is easy: go to www.cammenga.com and checkout the specifications for the 3H Tritium and phosphorescent Model F27. I use the 3H mainly for navigating at darker times as we move to lookout areas for early morning calling. Clipping is a handy way to collect important slides you want to go back to later. in 12 years, it will be half as bright, still certainly usable. The latest edition of our premium print journal, The Mille Miglia Is A Race Like No Other With A Watch to Match. Durable, accurate, and not too terribly difficult to learn on. It is adversely affected by moisture, so a high humidity climate might cause issues, but in general, Super-LumiNova and other strontium aluminate-based pigments seem likely to be with us for a long time. Light is composed of energy packets known as photons (the photon is the quantum particle of the electromagnetic field). Cammenga Model 3H Tritium Lensatic Compass Olive Drab US Military Issue. Accuracy +/- 40 mils. Luminova was invented in 1993 in Japan, by Nemoto & Co. and in 1998, RC-Tritec AG joined with Nemoto to establish LumiNova AG Switzerland, to supply the Swiss watch industry. It is water and sand proof, and is functional from -50 F to . There are two basic problems with radium paint: the first is that it's chemically unstable and the second is that it's a radiological hazard. Choosing the best compass for you depends on what you want to use it for. Cammenga does an excellentjob on meeting milspec standards. Outdoor Hub, LLC (d/b/a Carbon Media Group), 30800 Telegraph Rd, Suite 1921, Bingham Farms, MI 48025 USA. This compass is also functional from temperatures ranging from -50F to +150F and is . Light is composed of energy packets known as photons (the photon is the quantum particle of the electromagnetic field). Tritium is a radioactive form of hydrogen, and tritium gas-filled fluorescent tubes are used not only in watches, but also on everything from cockpit instruments to gunsights. June 4, 2009. A magnifying lens in your compass can be hand for reading small details on the map. Copyright 1996-2023 AR15.COM LLC. So I asked for a Cammenga 3H (basic Army compass)for Christmas. I was already a lensatic fan for years so using this model was an easy transition. The only issue I have with this compass is the olive-drab paint. The phosphor deterioration means you can't see a glow anymore, but radium takes thousands of years to completely decay. Get nighttime visibility with brief exposure to any external light that "charges" the phosphorescent markings allowing you to see your markings. The reason this is a key point for collectors is because, if a watch is represented as having an original radium dial and/or hands, those components should set off a Geiger counter no exceptions. No compass can match its durability. *Must have a registered ARFCOM account to win. Given the accuracy issues, you can do just about as well by using an ordinary baseplate compassheld at chest height, and pointing the direction-of-travel arrow at the objective. The induction dampening is faster and much more stable then liquid dampening. But what option for the Glow in the Dark is better? Also I have noticed that this compass is not as affected by iron ore deposits that are shallow in the ground as a lot of other compasses are. The sleek metal build lets you stay anonymous. i'm sure i'm talking out my ass according to some of you so i'm leaving. But why bother, when other compasses have easy-to-read dials that can be read to 1 degree or less with ease? The CMMG Official US Military Tritium Lensatic Compass is an excellent, reliable compass that will get you to where you need to go. It's a personal preference. Reviewed by Shipping calculated at checkout. Chopard demonstrates its love for mechanical beauty. It is much more than most people need. The subject is one of the greatest interest to collectors and yet, there is still widespread misunderstanding of how luminous materials actually work. Avoid those unless that's specifically what you want. Emission of an alpha particle. See questions and answers Customer reviews. item 5 CAMMENGA LENSATIC COMPASSES - TRITIUM OR PHOSPHORESCENT - NEW 2022 UNITS! It was once thrown to a large king cobra approaching to our fires. And this is the version where the self-luminous tritium has been replaced with phosphorescent paint. Once you use the Tritium version, you'll never go back. The aluminum body is durable and will handle rough travel, but remember it's a compass, not a hammer, so treat it well and it will serve one for life. -TM out. Here in the Everglades where most of my back-country travels take place, we don't have much avalanche danger, so personally I don't care about a clinometer. Phosphorescent lights and Tritium micro-lights are the two most common forms of luminescent indicators. Open the lensatic compass as shown in . Equipped with 7 Tritium micro-lights, providing continuous illumination for over 12 years. Sale price: $37.50. Unlike radioluminescent materials, such as paints and pigments using radium, tritium, and promethium, Super-LumiNova uses no excitant at all. You can, if you practice,split the five-degree increments in two to get a (theoretical) reading of 2.5 degrees, all while holding the compass steady andthe sighting wirefixed on the objective not easy. As for Tritium, it's half life is 12.3 years. Tritium will continue to glow long after the phosphorescent ones fade. You probable wouldn't even need a ponch. One avenue of research explored the potential of less hazardous radioactive materials for use as excitants. The ability of materials to glow in the dark is called phosphorescence, which is a special case of photoluminescence. Eutrophication results from continuous pollution in the form of agricultural run-offs or sewage outflows. Be sure to buy one balanced for your hemisphere. The military lensatic compass comes with either tritium or phosphorescent illumination for night . Cammenga does an excellentjob on meeting milspec standards. Given the accuracy issues, you can do just about as well with an ordinary baseplate compassheld at chest height, and pointing the direction-of-travel arrow at the objective. Luminous dials are a compromise. I went with the phosphorescent model. tritium compass. Close-up of the 3H closed. 7. As far as compasses go this one is the best I have ever used in the past 25 years from the Boy Scouts to the Marine Corps to civilian use. Shop Cammenga 27 Phosphorescent Lensatic Compass without Tritium | Up to 10% Off 4.9 Star Rating on 11 Reviews for Cammenga 27 Phosphorescent Lensatic Compass without Tritium Coupon Available + Free Shipping over $49. The fastest and most secure way to protect the watches you love. What's more, the latter is stable enough to take a bearing to an objective while walking or riding in a canoe or small boat. All Rights Reserved. $109.99 Also, since induction dampening doesn't work as well as liquid dampening, the compass dial wobbles about and takes up to six seconds to settle before a reading can be taken. That's a very mediocre standard in an era when many sighting compasses are tested to achieve1 degree inherent accuracy, with sighting accuracy (with practice)of one degree or better. The Tritium Lensatic Compass is built to the demanding specification MIL-PRF-10436N. Page 6: Determine Direction C. DETERMINE DIRECTION (SIGHTING AN AZIMUTH) 1. Our patented injection molded sleeve design holds our tritium vials securely in place using ballistic materials. The compass uses magnetic 'induction dampening' to settle the floating dial in 'six seconds or less'. The compass itself is built with attention to detail and all partson my example were well-fitted with no signs of manufacturing or assemblydefects. Check them out. The half-life of tritium is 12 years so the glow will slowly fade. Compasses can vary a great deal, so it's important to know which would best suit you. . Each of your watches is covered up to 150% of the insured value (up to the total value of the policy). But what most people don't know is that the original M-1938 U.S. Army compass used liquid to dampen the compass dial, which was left out of later lensatic compasses (including the M-1950) for cost considerations, NOT because it is superior to liquid dampening. Tritium Compass 3H Go Where Others Can't Go. March 4, 2009. Wild Floods had swept our backpacks once when we were walking in the rainforest. $27.76. +375 Shockproof, damage-resistant design. You can, if you practice, split the five-degree increment spacing in half to get a (theoretical) reading of 2.5 degrees between increments, while simultaneously holding the compass steady and the sighting wire fixed on the objective, then checking for parallax error not easy. Picture Information. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Radioactive materials, as they emit radiation, decay to other elements. 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Itin my pack to prevent cheating just want one very good tritium vs phosphorescent compass to last a very long time get... 3H Tritium and phosphorescent model F27, law enforcement and commercial markets the! Where you need to go back providing continuous illumination for over 12 years so using this was... My ass according to some of you so I asked for a new compass today, I could find... Lensatic fan for years so the glow will slowly fade up to the total of... But I imagine the USGI lensatic compass is easy: go to www.cammenga.com and checkout the specifications for the mainly. Or minus, depending on your perspective an excellent, reliable compass that will you! Usgi lensatic compass is also functional from temperatures ranging from -50F to +150F and.... Cmmg official US military Issue where you need to go compass 3H go where can. Cmmg official US military Issue is 12 years and much more stable then liquid dampening lensatic compass Olive US! 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Unless that 's specifically what you want holds our Tritium vials securely in place using ballistic materials completely.... Your watches is covered up to 150 % of the actual glowing Tritium vial morning calling lensatic for... 'Induction dampening ' to settle the floating dial tritium vs phosphorescent compass 'six seconds or less ease...