Because the latter is a gimbaled design, I can even take accurate compass readings while walking or riding in a small boat or canoe. It's like science truck-nuts for your pistol. This is NOT a replica. Another nice feature is that the magnifying lens, when folded down, locks the magnet in place to avoid damage from impact, shock, etc. They seem to sell just about everything to do with compasses. on a compass lets you measure the steepness of a slope, or the height of an object. n comparison, my liquid damped Suunto baseplate compass with 'global needle' settles in one second or less, and stays rock-steady, with no wobble. This phosphorescent compass is waterproof, shockproof, and sand proof. It's true that Cammenga's version of theM-1950 compass has a super-strong case and housing, and can't develop an air bubble since it's a dry card (induction dampening) design. However, lately I have been doing map reading instruction for new hunters. If you don't need all-night illumination, then this could be a good option. You will receive an email every Friday morning featuring the latest chatter from the hottest topics, breaking news surrounding legislation, as well as exclusive deals only available to ARFCOM email subscribers. 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 decay chain finally ends in a stable isotope of lead, but you get things like polonium and thallium en route. in Kjellstrom introduced the sport of orienteering to the USA in 1946. It has a dampening system, so it settles down relatively quick. You'll probably spend somewhere between $25 and $100 for a good compass. The half-life of tritium is 12 years so the glow will slowly fade. -TM out. I realize most people don't navigate at night but when you do, you need a compass that does not require white light to see it. All Rights Reserved. Cammenga, Model 27 Compass, Olive Drab US Military Issue pouch. The CAMMENGA MODEL 3H TRITIUM LENSATIC COMPASS is built to the demanding specification MIL-PRF-10436N. Vintage Cammenga Phosphorescent Military Compass Model 27 US. First, off it was like coming home again. Special Tritium Lensatic Compass is shock, water and sand proof, and functional from -50F to +150F. It also has no adjustable declination feature for relating all compass headings to true north. It is very accurate and easy to use and with the non liquid dampening system it is not effected by the extreme temperatures. Lensatic style features a magnifier lens on the rear sight to read compass dial headings for greater accuracy. This compass features both a 0-6400 mils scale (20 mil resolution) and a 0-360 degree scale (5 degree resolution), with an accuracy of +/- 40 mils. The Cammenga G.I. One new winner* is announced every week! I have used the milspec/issue Tritium H3 clam since 1979. (I used to believe that the tritium version was the best choice, but I've since shifted my thinking somewhat. Unlike phosphorescent sights that may only glow for a matter of minutes or hours. Cammenga Olive Drab Genuine Military Lensatic Phosphorescent Compass. And in the civilian world, things have changed a lot since then. 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. I've always been a major fan of this compass. The military lensatic compass comes with either tritium or phosphorescent illumination for night . Cammenga battle-tested Model 27 phosphorescent lensatic navigational and marching compass is made according to the U.S. Army Mil-Spec. The orienteering, or base plate, compass has the advantage of being a compass and protractor rolled into one. CAMMENGA LENSATIC COMPASSES - TRITIUM OR PHOSPHORESCENT - NEW 2022 UNITS! The shortcomings I have encountered with it are modest but worth noting. Product Details Description Specifications Reviews. 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 second quibble is that the scale markings along the straight edge available when the compass is completely open are suitable for 1:50,000 scale markings, but some of the markings (specifically, those for 2000 and 4000 m) aren't marked so as to quickly distinguish them from neighboring marks. Uses a copper induction-damping ring that slows, settles and steadies the compass needle quickly. 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. 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. meaning, in 12.3 years, it's going to be half as bright as original. Not a beginners compass, but not hard to master either. Quoted: Tritiums half life is 12.32 years. As the U.S. Militarys official compass manufacturer, Cammengas Tritium Lensatic Compasses have proven themselves repeatedly in almost every kind of environment and situation. Folks in avalanche country might like this. Cammenga is a good brand name. I've kept it in the car for road trips (this was pre-GPS) for those times where I was intentionally and utterly lost (and strangely happy. Brand-new, the G.I. *Must have a registered ARFCOM account to win. 2 compass were with us, a European baseplate one and a 3h Cammenga one. Case Cover: Closes to protect the compass and reduce carrying size. At present all of us are carrying one 3H to all our outings. 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. Shockproof, damage-resistant design. 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. +36 Compass type: Baseplate compass Weight: 1.06 ounces Dimensions: 1.4 x 3.2 x 5.1 inches Bezel Material: Plastic Declination Scale: Fixed My Review: The A-10 Recreational Field Compass is a durable, reliable, and lightweight baseplate compass made by SUUNTO.If you don't already know SUUNTO is one of the most . A few times I have taken this thing and a topo mapinto some relatively dense woods and shot bearings to an unseen destination about a mile distant, using both the sights and "shooting off the hip". Even in 1950, this compass was outclassed by the British Army'ssophisticatedMK IIIprismatic compass(+ or - 0.5 degree accuracy). [ARCHIVED THREAD] - Why Tritium over Phosphorescent compass. 1), it can be used as a straight edge or ruler. Price Paid: $50, Reviewed by any other answers are just folks avoiding cognitive dissonance. 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. 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. It has no romer scales, and only one 1:50,000 metric scale, which isn'tmuch use for USGS 1:24,000 topos. However, for normal camping, hiking etc, a non-Tritium compass will work as well as a Tritium compass and can save you a few bucks which can be spent on other gear. Announcement: My online Land Navigation course includes four hours of video instruction, and two downloadable PDF books, all for about the same price as a typical paperback book. In most cases, you'll get a personalized quote in seconds and your policy kicks in immediately. Features of Cammenga 27 Phosphorescent Lensatic Compass without Tritium. plus they are abundant round here. I also have a military with the tritium. As a result the M1950isn'tas well-suited to usewithUSGStopo maps and GPSunits for plotting locationas a more modern baseplate compass. A not-negligible point for some is this next one--no available declination adjustment. 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. The CAMMENGA MODEL 3H TRITIUM LENSATIC COMPASS is built to the demanding specification MIL-PRF-10436N. 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. +61 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. Cammenga Official US Military Tritium Lensatic Compass is a MIL-Spec compass made weatherproof with . The tritium inserts, which allow the compass to be read in absolute darkness for ten years, are a cool feature but I think Im in trouble if a find myself navigating by compass in the dark. Military Lensatic Compass. The 3HC model is Tritium and the luminescent never need charging for ten years then you replace it (note the compass will work just fine but with no or little luminescent). 1960s era black light poster. As a result the M-1950isn'tas well-suited to usewithUSGStopo maps and GPSunits for plotting locationas a more modern baseplate compass. Accuracy +/- 40 mils. Cammenga makes these with both phosphorus or tritium, the tritium being the more expensive (I'm a cheapskate so I went with the phosphorous both times). To get away with this, you need a phosphor that will glow enthusiastically for hours after exposure to light something that will act as a sort of "light bank," emitting stored energy in a measured fashion. 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 reason is I operate with kilometers and not miles when land navigating. But it can fog over in cold weatheror from moisture andhumidity changes in tropical regions, since the interior is filled with ordinary air, not purged with inert gas like your fogproof binoculars or rifle scope. AR15.Com reserves the right to overwrite or replace any affiliate, commercial, or monetizable links, posted by users, with our own. These are colloquially known as "black lights," and black light posters were a dorm room staple in the '70s (and for all I know might still be). Uses a copper induction-damping ring that slows, settles and steadies the compass needle quickly. The compass itself is built with attention to detail and all partson my example were well-fitted with no signs of manufacturing or assemblydefects. I wanted something more dependable than my old standby - the Silva's. Chuck Mellette Wild Floods had swept our backpacks once when we were walking in the rainforest. One new winner* is announced every week! 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