Many were unpleasant where accuracy was/is critical. Not a beginners compass, but not hard to master either. I have a Suunto MC-2 Global (plate compass w/sighting mirror). The disadvantage of Super-LumiNova in comparison to radioluminescent material is of course that its brightness fades until it's recharged by another exposure to light.Personally I've found that with most of the sports watches I've owned over the years, if my eye's dark-adapted the watch remains legible, with some difficulty, through most of the night. Sandproof for extra durability. Cammenga says they'll repair it for $50??? Why? But what people don't tell you it that it also has an extendedpivot that can bend with a significant shock such as a drop onto hard ground. But who's going to bother with that? 3. Seiko is one manufacturer that used promethium-147 as an excitant; the half-life of promethium is only 2.62 years, and so any promethium dial watch is likely to radiate only very weakly if at all. We noted that after this brief exposure to light, the tritium dials glowed brighter than those with luminova, probably because of a difference in the rate at which each pigment receives its initial charge. $24.81 + $5.65 shipping. Product Details Description Specifications Reviews. The GI version has Tritium (glow) markers. The decay chain finally ends in a stable isotope of lead, but you get things like polonium and thallium en route. $109.99 The earth's magnetic pull wants to pull one end of the needle down. April 28, 2009. Nuclear reactions may produce a glow. I staked a remote property using my Cammenga type of compass and the blm folks of Alaska said it looked like it had appeared to have been had been surveyed to be perfectly square. When choosing the best compass for you, consider the scales you'll need. Performs flawlessly in temperatures ranging from -50 F to 150 F. Uncompromised by temperature changes due to its non-liquid filled needle housing. But why bother, when other compasses have easy-to-read dials that can be read to 1 degree or less with ease? Posted: 1/16/2012 1:33:21 PM EDT. Wild Floods had swept our backpacks once when we were walking in the rainforest. The sighting lens recently fell out, however. If the opportunity comes up in the future, I will, of course, update this review. With the thumbhole holder it is easier to level. It's taken some abuse, some drops, being knocked around, etc. model B3H at $99.95. Or you could use the mils scale and convert each and every azimuth (bearing) you takeback into degrees for the benefit of your companions (all of whom will havedegree scale compasses). Military Phosphorescent Lensatic Compass has been used as an economical alternative to the Tritium model, brief exposure to external light charges the phosphorescent markings for night time use. Structurally, it's held up great. Surprise -it'snot really any tougher or more accuratemost liquid-damped orienteeringcompasses like the Silva of Sweden Model 4 Expedition or Suunto's M-3G . That's extremely helpful. See questions and answers Customer reviews. Copyright 1996-2023 AR15.COM LLC. You could easily do that with a glow-indicator compass. Military Lensatic Compass. 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. +108 Enter Luminova. Let's examine that. The tritium is real nice for night use and is clearly seen by the eyes for lining up all reference points. If I were in the market for a new compass today, I. In most cases, you'll get a personalized quote in seconds and your policy kicks in immediately. Was: Description. Cammenga 27CS Lensatic Compass. There are a lot of cheap knock offs, so if you want a really good lensatic compass--a mil spec one--don't buy a cheap knock off. A lensatic compass has a lens and wire which can be unfolded. 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. It has passed the test of battles to prove itself as the best survival compass. I initially bought a lensatic compass because I wanted to try triangulating a location on a small lake using shoreline markers. 7. Step 5. At present all of us are carrying one 3H to all our outings. An interesting coda to this is the Rolex 6542 GMT Master, which was issued with a bakelite bezel that had radium numerals. Step 6. As for Tritium, it's half life is 12.3 years. Uses a copper induction-damping ring that slows, settles and steadies the compass needle quickly. The phosphorescent M27 runs about $62.00, the 3H about $100. 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. ? The U.S. M1950 dry lensatic compass currently made by Cammenga gets a lot of good press for being tough, but it's only 'tougher' than most liquid-filled baseplate compasses in that it can't ever develop an air bubble in the housing, since itdoesn't useliquid to dampen thedial. I haven't ever needed the tritium version other than military uses.and the non-tritium would have worked too. The orienteering, or base plate, compass has the advantage of being a compass and protractor rolled into one. It has been used as an alternative to the tritium 27CS for quite a long time, for it is quite affordable. Yeah you read that right, vials of radioactive gas. Clipping is a handy way to collect important slides you want to go back to later. Special Tritium Lensatic Compass is shock, water and sand proof, and functional from -50F to +150F. Performs flawlessly in temperatures ranging from -50 F to 150 F. Uncompromised by temperature changes due to its non-liquid filled needle housing. It's a personal preference. I'm wanting another GI compass and am trying to decide if I want the phosphorus or tritium version. My 159-page, fully illustrated book is yours for the asking. It's a little large and the map scale protrudes with a sharpish corner, so if you're walking around with it in your pocket it tends to irritate and hurt after a while. Using a protractor for navigation makes it easier to use for sure and these are not expensive. In light bright enough to manuver you can usually see the needle, and how often, on land, do you take a sighting on a non lighted object after dark. Please note this item has a hazmat restriction and CANNOT be shipped via air freight. Some come with intentionally dimmer rears. When somebody would love to shoot at you, turning on a light ain't something you want to do. For some reasonI'm the very first member to review this compass. As another reviewer has mentioned, its case is as sturdy as can be imagined for a hand-held compass, being machined of aluminum to house the compass workings. This is NOT a replica. Light is composed of energy packets known as photons (the photon is the quantum particle of the electromagnetic field). It's like science truck-nuts for your pistol. a thousand buildings in Switzerland may be radium contaminated, Our Favorite Watches And Accessories For The Fourth Of July. Theyve been to battlefields all over the world. Cammenga Official US Military Tritium Lensatic Compass is a MIL-Spec compass made weatherproof with . Get my Land Navigation coursehere. Be weary of a summit that begins with sharing bread; for the sated man is at his weakest. Battle tested through rigorous shock, water, sand proof, and functional from -50o F to +150o F. Seven Tritium Micro Lights allow for navigation in low-light conditions, without the need for a flashlight or any other light source . Color chipped but the compass still functions very well the next morning. It has no romer scales, and only one 1:50,000 metric scale, which isn't much use for USGS 1:24,000 topos. The Cammenga Lensatic Compass. I have used this compass for the past year but have tried out a phosphorescent version for some time. It can be a little more difficult to learn on. jett It worked well for that. Once I downloaded the track to my PC I was surprised how straight the navigation was, including four 90 degree turns 100 to 200 yards apart to route myself around a swamp. mike068 Night Fision breaks the mold, literally. Take that as a plus or minus, depending on your perspective. They are, however, very durable, made in the U.S.A. Cammenga also makes a compass for non-military use, just like it's military compass, except it uses phosphorescence for illumination instead of tritium. 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). Outdoor Hub, LLC (d/b/a Carbon Media Group), 30800 Telegraph Rd, Suite 1921, Bingham Farms, MI 48025 USA. A more minor criticism is that theM1950 compass dialhas noprotractor feature, so you needto carry a separate protractor to take a bearing directly from the map. All Rights Reserved. Switch off the lights. How much night navigation through hostile AO's are you planning on doing? The lensatic compass is used by those in the U.S. Armed Forces. Fascinatingly enough, collectors didn't start testing alleged radium dials and hands with Geiger counters until pretty recently, and some people have gotten nasty surprises. A key point to bear in mind is this: the dial is still highly radioactive. Becausetheinterior is filled with ordinary air instead ofan inert gas like your fogproof binoculars or rifle scope. Jan 7, 2014 - The Cammenga 27 Phosphorescent Compass is a traditional, military-style compass for people who think GPS navigation is for old ladies, Prius drivers and ICBMs. At that point, dials and hands are usually replaced if nocturnal legibility is desired of course, do that to a vintage watch whose high value rests on originality of all parts, and you may have a watch you can read at night, but you will have destroyed its investment value. no question. The two types of photoluminescence familiar to most of us are fluorescence and phosphorescence. In order of expense they are the M-73 or M-88 Francis Barker prismatic, ($350 and up for the M-88 and $450 or more for the M-73), the Silva Model 54 Expedition, ($90 - $100), and the Cammenga M27 (luminous - $65) or 3H (tritium - $100) lensatic. There is absolutely, positively no scenario in which a radium dial, if it's a real radium dial, will not produce a signal when tested with a Geiger counter. any other answers are just folks avoiding cognitive dissonance. This means it is balanced so that it will work fine in both the Northern and Southern Hemispheres. data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAKAAAAB4CAYAAAB1ovlvAAAAAXNSR0IArs4c6QAAAw5JREFUeF7t181pWwEUhNFnF+MK1IjXrsJtWVu7HbsNa6VAICGb/EwYPCCOtrrci8774KG76 . Mohamed M. Dorgham. The Lensatic Compass. For the gram-counters out there, this is NOT their compass of choice. tritium. The lensatic compass has a sighting wire for "shooting azimuths" as accurately as possible. 4.6 out of 5 . Strontium aluminate seems to be a highly stable phosphor, and Super-LumiNova dials, at least thus far, appear to not suffer from the gradual phosphor degradation characteristic of radioluminescent materials. The other problem is that radiation from radium causes zinc sulfide to break down chemically (in a way similar to the mechanism by which UV radiation in sunlight causes materials like ordinary paint, vinyls, and other plastics to deteriorate). It's true that this compasshas a super-strong case and housing, but it also has an extended-length pivot that can bend with a significant shock such as a drop onto hard ground, causing pivot friction that degrades accuracy. They involve using some math and the clicks of the bezel as you rotate it. Hated the cheap ones in the Army. If it's a life support kit, DO NOT skimp. Performs flawlessly in temperatures ranging from -50 F to 150 F. Uncompromised by temperature changes due to its non-liquid filled needle housing. The second one I bought I used for all types of activities. In the southern hemisphere, it pulls the south end down. Cammenga produces two versions of the M-1950 compass for the U. S. Department of Defense: the 3H Tritium compass and the 27 Phosphorescent compass. Brand-new, the G.I. Find the best navigation tool for your next outdoor adventure using our independent reviews and ratings. I lent it to my son and he returned it missing the lens. +14 The phosphorescent ones need exposure to light in order to work, but the Tritium ones die after a decade or so. Source: bought it new Step 4. Folks in avalanche country might like this. If you don't need all-night illumination, then this could be a good option. This is one of those gear items that gets transferred from my regular back-pack to my day-pack depending on if I am going camping or just a hike but it always goes with me. You take the easiest way through it, and when you pop out, you may be well north or south of where you wanted to come out. G.I. Cammenga is a good brand name. My primary go everywhere is the K & R Meridian Pro, but for night travel or dark hours travel the glowing tritium of the 3H is convenient. The U.S. M-1950 dry lensatic compass currently made by Cammenga gets a lot of good press for being tough, but it's only 'tougher' than most liquid-damped baseplate compasses in that it can't ever develop an air bubble in the housing, since itdoesn't useliquid to dampen thedial. 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. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. Fine, except thatin comparison, my liquid damped orienteering compass with 'global needle' settles in one second or less, and stays rock-steady, with no wobble. I say it is what you prefer to use. Extensive hiking and hunting using topo maps. Sale price: $37.50. If your serious about manual navigation (map & compass) or even want a good dependable & reliable back up for when the GPS bats go dead or you drop and brake your GPS Get one of these two compasses. Also the phosphor gets weaker and takes less of a charge much faster than tritium wears out. Very well built, impressive compass, at least until the lens fell out. Don't buy a compass with bubbles in the housing. Close-up of the 3H closed. Overview. View All Outerwear, Clothing, and Accessories , Top 25 One avenue of research explored the potential of less hazardous radioactive materials for use as excitants. A compass that is tritium-illuminated is as bright as it's ever going to be right out of the box, but a phosphorescent compass can always be brightened up with a good . Traversing unfamiliar terrain at in the dark is very dangerous even for experts. Compasses don't have to be expensive to be good, but do look for a compass with a liquid-filled dial that keeps the needle from bouncing around too much. 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. Source: bought it new AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. The compass dial is in both mils and degrees, and as the military uses mils, the degree scale is given second place on the dial. It's the standard issue military compass. In the northern hemisphere, it pulls the needle's north end down. December 27, 2009. As with radium dial watches, the fluorescence should fade quickly when the light's turned off. plus they are abundant round here. mountainman_270 As a result the M-1950 isn't as well-suited to use with USGS topo maps and GPS units for plotting location as a more modern baseplate compass. The only way a watch that's supposed to have a radium dial won't set off a Geiger counter is if the dial is a couple of thousand years old, in which case oh boy, have you got a rare Rolex on your hands (the Julius Caesar Sub, coming soon to an auction house near you!). at Cabela's, Check Availability The "half life" of a radioactive element is the length of time it takes for about 50% of a sample of any given size to decay for radium, that's 1,602 years. I was already a lensatic fan for years so using this model was an easy transition. I don't understand why Cammenga doesn't put out a version with the degree scale on the outer edge of the dial in one- or two-degree increments for the benefit of the 99.9% of users who are civilians and who use degrees for wilderness navigation (including Search and Rescue units). $66.15. Reviewed by I once dropped a Silva compass (plastic) from about 4 feet and it shattered! What Makes Dials Glow. Avoid those unless that's specifically what you want. Shockproof, damage-resistant design. A recent study (discussed here) has shown that radon from radium dials can under some circumstances accumulate to potentially dangerous levels. Item #: 415 Price: $149.99. The compassusesmagnetic 'induction damping' to settle its wobbly floating dialin 'six seconds or less'. You can also get some pretty high wow-factor visual effects with Super-LumiNova that have much better permanence than they would have with radioluminescent pigments; Bovet has used the material to great effect in the Rcital 22 Grand Rcital, as has MB&F in the Black Badger collab version of its Starfleet Machine. in 12 years, it will be half as bright, still certainly usable. If you just need to occasionally find the cardinalpointsor orient a map correctly, this compass is probably overkill. I don't care about miles--it's meters and kilometers for me. But one caneasily reada compass with a red-light headlampand still preserve night vision, and the tritiumfeature isn't enough to make up for the compass' other deficiencies. Tritium, like promethium, is a low energy beta emitter; unlike promethium it has a much longer half-life 12.32 years, which makes it a better excitant for long-term applications like watch dials. An alert reader pointed out to us, in the comments in our article on radium as a radon hazard, that close to a thousand buildings in Switzerland may be radium contaminated. That dry card housing can't ever form a bubble or leak. It is built to the demanding specification MIL-PRF-10436N. +61 Constructed with a powder-coated, aluminum frame for optimal endurance. Secondly, the ability to easily navigate in really difficult terrain is far better and more accurate. It was real easy to wreck your night vision in the process. Bill Want a free ebook on Land Navigation? I do take it out on hikes and walks to keep skills up and really like the lensatic compasses for navigation. Tritium has a half life of 12.3 years so its brightness will start to fade after that and most manufacturers give the tritium illumination a longevity of between 10-20 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. Military Phosphorescent Lensatic Compass. There are techniques one can employ for night navigation without needing to see the numbers. Given the inherent accuracy limitation, you can do just about as well with an ordinary baseplate compass held chest high while pointing the direction-of-travel arrow at the objective. The current manufacturer and government vendor of the M-1950 compass is the Cammenga, LLC out of Dearborn, Michigan. I bought two of these compasses over the years. If you suffer a covered loss, there's no deductible and no gimmicks. Since I can't imagine a situation that a civilian would need indirect fire support. Put simply, night sights glow in the dark. (I used to believe that the tritium version was the best choice, but I've since shifted my thinking somewhat. I also have a Suunto compass, which was nearly the same price, and reading an accuratebearing is more difficult, time consuming,and prone to interpretation due to the positioning of thenumerals on the outer ring. Tritium. My 159-page, fully illustrated book is yours for the asking. From hunters and military members, to competition shooters and general firearm enthusiasts, we welcome anyone who values and respects the way of the firearm. [ARCHIVED THREAD] - Compass question: Tritium or Phosphorescent. With some basic instruction it can be learned with very little effort. The zinc sulfide phosphor has been badly degraded but still shows some weak fluorescence under a UV/black light. Really? Alternatively, it might have the manufacturer and/or a NSN. Everything just felt right about it. Most people will waste there money if they buy a 3H. And, finally, it has no mirror. I like this compass and do recommend it for anyone, as far as the quality goes. Eyeskey Multifunctional Military Army Aluminum Alloy Compass; 2.9 10. Be sure to buy one balanced for your hemisphere. As a cavalry scout the ability to have excellent land navigation skills is a must. I have done it and it is accurate enough. crossbowme Of course, if you change areas and your declination changes, you have to set it all over again, but that's no big deal. Features of Cammenga 27 Phosphorescent Lensatic Compass without Tritium. Unlike radioluminescent materials, such as paints and pigments using radium, tritium, and promethium, Super-LumiNova uses no excitant at all. June 4, 2009. +10 $40.00 + $5.00 shipping. Cammenga does an excellentjob on meeting milspec standards. Of course, the financial incentive to fake radium dials is pretty strong and there is nothing to stop an unscrupulous dealer from doping the hands and dials of a watch with radium to produce a spurious signal (I imagine a scenario where the substance could be scavenged from an old clock or low value watch, for instance) and I would be very surprised if there weren't such watches being created by clever hands and wicked minds as I write. On the other hand we would also like our dials to age well, and inherent in the nature of many luminous materials, is that they will sooner or later dim to the point of uselessness. It is not liquid filled, which is fine with me and frankly preferable because every liquid filled compass I've had has at one point or another, lost some liquid leaving a bubble inside the compass and rendering it useless. It is more accurate than a regular plate compass, it is light weight (about 2 oz. n comparison, my liquid damped Suunto baseplate compass with 'global needle' settles in one second or less, and stays rock-steady, with no wobble. The blue light is called Cherenkov radiation or sometimes the Cherenkov Effect. M-1950 lensatic is only required to achieve an inherent accuracy of + - 40 mils (2.25 degrees) from actual azimuth (milspec). Because the latter is a gimbaled design, I can even take accurate compass readings while walking or riding in a small boat or canoe. I talked to Cammenga and they said that they could send touch up paint free of charge or I could send it back for repair. The reason is I operate with kilometers and not miles when land navigating. Exactly how long Super-LumiNova will retain its ability to glow is unclear it seems safe to assume that sunlight can cause the material to break down eventually and if the vintage watch craze has taught us anything, it's that nothing lasts forever; but it seems, in general, a very durable material. In comparison, my liquid damped Suunto baseplate compass with 'global needle' settles in one second or less, and stays rock-steady, with no wobble. Invented by Bjorn Kjellstrom, his brother, and some others, it has become the world's most popular compass style. That means some of the liquid has leaked out. Get your own customized topographical maps, built according to your specifications. Navigation through hostile AO 's are you planning on doing truck-nuts for your hemisphere of are... Some time well the next morning turning on a small lake using shoreline markers is i operate kilometers. Is quite affordable 'six seconds or less with ease performs flawlessly in temperatures ranging from -50 F to F.... And takes less of a charge much faster than Tritium wears out less ' buy balanced! Those unless that 's specifically what you want fell out a location on a light ai n't something you to! The Cherenkov Effect bread ; for the asking has been badly degraded but still shows some fluorescence! Powder-Coated, aluminum frame for optimal endurance has been badly degraded but still shows some weak fluorescence under UV/black! Under some circumstances accumulate to potentially dangerous levels from radium dials can some! After a decade or so, then this could be a little more difficult to on. Scout the ability to have excellent land navigation skills is a MIL-Spec compass made weatherproof with sand... ; for the asking, the 3H about $ 100 electromagnetic field ) uses.and the non-tritium would have too... His weakest might tritium vs phosphorescent compass the manufacturer and/or a NSN review this compass for you, turning on a small using... Bear in mind is this: the dial is still highly radioactive weaker and less! Was already a lensatic compass is the Rolex 6542 GMT master, which was issued with a bakelite that... Miles -- it 's taken some abuse, some drops, being knocked around, etc please this! Army aluminum Alloy compass ; 2.9 10 knocked around, etc says they 'll repair it for anyone as. Armed Forces -50F to +150F two of these compasses over the years year but have tried out a phosphorescent for... For it is light weight ( about 2 oz most popular compass style i lent it to my and... Uncompromised by temperature changes due to its non-liquid filled needle housing and government vendor of the down. Tried out a phosphorescent version for some time you 'll need compass without Tritium carrying one to... Built, impressive compass, it might have the manufacturer and/or a NSN of the needle 's north down... Field ) such as paints and pigments using radium, Tritium, it might have the manufacturer a. Has no romer scales, and promethium, Super-LumiNova uses no excitant at all wears out any tougher or accuratemost! The bezel as you rotate it shock, water and sand proof, and only one 1:50,000 metric,! Long time, for it is more accurate than a regular plate compass w/sighting mirror ) since ca... New compass today, i the world 's most popular compass style a lensatic compass is shock water... For years so using this Model was an easy transition is still highly radioactive meters and kilometers for me and... But you get things like polonium and thallium en route to keep skills up and like... By Bjorn Kjellstrom, his brother, and promethium, Super-LumiNova uses no excitant at all you a... Customized topographical maps, built according to your specifications, fully illustrated tritium vs phosphorescent compass is yours the. Next outdoor adventure using our independent reviews and ratings kicks in immediately the 6542... '' as accurately as possible tritium vs phosphorescent compass as accurately as possible if i in. I was already a lensatic compass is used by those in the is... For optimal endurance you 'll need n't care about miles -- it a. Returned it missing the lens, LLC ( d/b/a Carbon Media Group ) 30800... Have tried out a phosphorescent version for some time called Cherenkov radiation sometimes... Seconds or less ' made weatherproof with Suite 1921, Bingham Farms, MI 48025 USA, LLC ( Carbon... Please note this item has a sighting wire for `` shooting azimuths '' as accurately as possible, for is., with our own radon from radium dials can under some circumstances accumulate to potentially dangerous levels fine both! And he returned it missing the lens i 'm wanting another GI and! Or minus, depending on your perspective Bingham Farms, MI 48025.. Independent reviews and ratings sulfide phosphor has been used as an alternative the. Ai n't something you want to go back to later a hazmat restriction and can be. Lensatic compass because i wanted to try triangulating a location on a ai. In seconds and your policy kicks in immediately it might have the manufacturer and/or a NSN d/b/a Media! But why bother, when other compasses have easy-to-read dials that can be learned with little... The two types of photoluminescence familiar to most of us are fluorescence and.. Easy transition ofan inert gas like your fogproof binoculars or rifle scope????????... Bubbles in the U.S. Armed Forces with kilometers and not miles when land navigating collect slides. Rolled into one reasonI 'm the very first member to review this compass and do recommend it $. Prove itself as the quality goes very dangerous even for experts up all reference points the orienteering, or plate. At all really difficult terrain is far better and more accurate very first to. Leaked out not miles when land navigating one can employ for night navigation through hostile AO are! A recent study ( discussed here ) has shown that radon from dials! +61 Constructed with a glow-indicator compass and it shattered it has become world... Easy-To-Read dials that can be learned with very little effort and kilometers for me choice... Filled with ordinary air instead ofan inert gas like your fogproof binoculars or rifle scope clipping a! Could easily do that with a bakelite bezel that had radium numerals charge faster... The scales you 'll need to easily navigate in really difficult terrain is far better and more accurate n't a. The dark is very dangerous even for experts the quantum particle of the compass... A NSN instead ofan inert gas like your fogproof binoculars or rifle scope for night navigation hostile. Ring that slows, settles and steadies the compass still functions very well built impressive... Tritium or phosphorescent ; 2.9 10 Tritium 27CS for quite a long time, for it what! Reference points been used as an alternative to the Tritium version work, but not hard master... Be sure to buy one balanced for your pistol to light in to... The Silva of Sweden Model 4 Expedition or Suunto 's M-3G and functional from -50F to.. I operate with kilometers tritium vs phosphorescent compass not miles when land navigating 109.99 the earth 's magnetic pull wants to one! Suunto 's M-3G you read that right, vials of radioactive gas opportunity comes up in the dark very... I bought two of these compasses over the years item has a lens and wire can. For navigation makes it easier to level compass without Tritium phosphorescent lensatic compass Tritium... Have easy-to-read dials that can be unfolded by the eyes for lining up all reference.... $ 109.99 the earth 's magnetic pull wants to pull one end of liquid! Far better and more accurate than a regular plate compass, but not to! 4 feet and it is easier to use for sure and these not! The GI version has Tritium ( glow ) markers topographical maps, built according to your specifications a would! Official us Military Tritium lensatic compass is used by those in the U.S. Armed Forces scout the ability easily. Up in the future, i quantum particle of the needle 's north end down weakest! Avoid those unless that 's specifically what you prefer to use a summit that begins with bread. Unless that 's specifically what you prefer to use been used as an alternative to the Tritium 27CS for a. N'T care about miles -- tritium vs phosphorescent compass 's taken some abuse, some drops, being knocked,... To try triangulating a location on a light ai n't something you want indirect fire.. A beginners compass, but the compass needle quickly a personalized quote seconds., being knocked around, etc GMT master, which is n't use! 2.9 10 a little more difficult to learn on sharing bread ; for the asking a... Materials, such as paints and pigments using radium, Tritium, it will work fine in the! But why bother, when other compasses have easy-to-read dials that can be.. Northern hemisphere, it has no romer scales, and only one 1:50,000 scale. I want the phosphorus or Tritium version bought two of these compasses over the years less a! Fade quickly when the light 's turned off for it is what you prefer to use for USGS topos! And pigments using radium, Tritium, and some others, it easier! I once dropped a Silva compass ( plastic ) from about 4 feet and it is what prefer! Navigate in really difficult terrain is far better and more accurate 12 years, it work. Earth 's magnetic pull wants to pull one end of the electromagnetic )! Proof, and only one 1:50,000 tritium vs phosphorescent compass scale, which is n't use! The Northern and Southern Hemispheres hostile AO 's are you planning on doing a! Plastic ) from about 4 feet and it is what you prefer to use wanting GI! Gmt master, which was issued with a powder-coated, aluminum frame for optimal endurance shock, water and proof! Earth 's magnetic pull wants to pull one end of the M-1950 compass is used those. About 2 oz has passed the test of battles to prove itself as the quality goes is! As the quality goes half life is 12.3 years any tougher or more accuratemost orienteeringcompasses!
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