Compass, prismatic, mk3 by peter laidler i am a compass maker by trade, and this article, while obviously written in good faith, gives fatally flawed information that will lead people to carry out work on beautiful, precision instruments, that will do such damage as to possibly render the compass beyond economical repair. The m 73 liquid prismatic compass is a robust, precision instrument of predominantly brass construction, designed to withstand the most arduous climatic conditions. The video is not a demonstration of how to service a liquid prismatic compass, but is an indication of the problems an unqualified person will encounter should they try to do it themselves. The british army prismatic marching compass m73 has become a bit of a classic of its time. Prismatic compass for sale vintage bronze army style prismatic marching compass. Once i downloaded the track to my pc i was surprised how straight the. The top countries of suppliers are india, china, from which the percentage of prismatic compass supply is 26%, 73% respectively. I had to adjust the hairline see diagram window a little since it was off kilter, but thats it.
Silva do a model 546400b aka 454 prismatic compass which does not actually have a prism it has a sighting lens allied with a mirror in the capsule and a proper compass card rather than just a pointer. Place the fully opened compass on the map with the scale edge alongside a northsouth meridian longitudinal line, grid line. The m73 liquid prismatic compass is a robust, precision instrument of predominantly. Jun 06, 2017 a military training film supervised by an officer appointed by the general staff. The m73 liquid damped prismatic compass is a robust, precision instrument made in the united kingdom for military use. Tempestini systems m73 black liquid prismatic compass. A prismatic compass uses a prism to allow the reading of the card and viewing of the object of interest together, hence the name. The traditional liquid prismatic compass is currently in service worldwide, built to meet the exacting accuracy and high specifications demanded by users. It is much lighter than the classic m73, but equal to it in terms of performance. With a bubble level, which can improve its accuracy and decrease its errors.
Im chuffed to have found a useable 70 year old prismatic compass. The m73 liquid damped prismatic compass is a robust, precision. Francis barker m88 military prismatic compass mils olive. The m88 liquid prismatic compass is built to the same exacting standards as the m73, but is made largely from aluminum alloy making it very lightweight. The compass body is constructed mainly from brass and incorporates a bellows expansion system to allow for volumetric changes in the damping fluid contained within the capsule. Oct 05, 20 it was apparently very well made and quite accurate. North arrow of the lensatic compass will point 11 degrees west of true north. Quick, precise settlement of the liquid filled dial assembly allows rapid use of the compass in field conditions. Francis barker m88 prismatic military compass compass library. This type of compass is a light and simple instrument and is used for rough surveys where too much accuracy is not necessary. An excellent francis barker m 88 military prismatic marching compass, boxed and in mint condition. Find details of companies offering liquid prismatic compass at best price. Prismatic compass definition is a surveyors hand compass provided with a triangular glass prism so adjusted that the compass can be read while taking a sight.
Liquid filled compass can be used in land or sea by architects, engineers, yachtsmen, foresters, geologists or defence forces for direction finding during day as well as night. The british mk iii compass is a good example of a prismatic compass. The m73 liquid prismatic compass is a robust, precision instrument of predominantly brass construction, designed to withstand the most arduous climatic. Prismatic liquid compass army pattern black finish product description. Five selfluminous tritium light sources enable full night operation. Aug 30, 2007 this lovely chap, stuart, will repairrefurbishclean a stanley g150 prismatic compass for a reasonable price. A military training film supervised by an officer appointed by the general staff. Mkiii black military compass, military compass recordler. This m73 brass presentation compass is fully ruggedised and will operate with precision accuracy to within half a degree, in temperatures from 55c 1f down to 30c 22f. Liquid filled prismatic compass is a robust, precision instrument of predominantly brass construction, designed to withstand most arduous climatic conditions. It is marked on the back with m73, pat appl, the iraqi armed forces symbol and a serial number. The m 1938 compass, prismatic has a similar design to the early lensatic compass but its cylindrical case stands higher and is not squared off with a ruler edge like the later lensatic compass models, it has some type of liquid inside. Prismatic compass, prismatic compass manufacturers. Generally regarded to be one of the finest compasses available.
Aug 21, 2011 the british army prismatic marching compass m73 has become a bit of a classic of its time. Compass collector verners pattern compasses page 1. The m 88 liquid damped prismatic compass is built to the same exacting standards as the m 73, but is made largely from aluminium alloy making it very lightweight. Provided with an aluminum floating circle graduated to read 30 minutes 0. Cepat, penyelesaian yang tepat dari cairan yang diisi dial pemasangan membolehkan penggunaan yang cepat dari kompas segala bidang kondisi. In 1895 f barker produced a verner compass nos 327 and j h steward produced both a verner compass, a major verners sergeants compass and a major w verners patent night marching comapss which were all pocket compasses and not prismatic compasses. The prismatic compass has been designed to give accurate magnetic headings.
Surveying instrument makers camberwell road, london. Get prismatic compass at best price with product specifications. The compass was used by officers and technical staff, and was not issued in large numbers to enlisted men. It is much lighter than the classic m 73, but equal to it in terms of performance. This compass is made into a box which is circular and 85 to 110 mm in diameter. Contact verified liquid prismatic compass manufacturers, liquid prismatic compass suppliers, liquid prismatic compass exporters wholesalers, producers, retailers and traders in india.
Compass surveying is a type of surveying in which the directions of surveying lines are determined with a magnetic compass, and the length of the surveying lines are measured with. It has a 218inch dia face marked in 5degree increments, a 14inch dia sight lens, 916inch dia bubble level, and a 112inch sight with crosshairs. Find your own way vintage mkiii marching compass part. Barker traditional military liquid prismatic compass is currently in service with many defense forces around the world, and has been for many years. Specification, provided with slow motion type prism reader fitted with colored glasses green and red. Examining the liquid prismatic compass with thanks to member trademarklondon for this video. This m73 francis barker tritium liquiddamped prismatic compass is considered by many to be the best handheld military compass in the world.
A prismatic compass is a navigation and surveying instrument which is extensively used to find out the bearing of the traversing and included angles between them, waypoints an endpoint of the lcourse and direction. M73 degrees black liquid prismatic compass pyser optics. The m 73 liquid damped prismatic compass is a robust, precision instrument made in the united kingdom for military use. Find your own way vintage mkiii marching compass part 1. I checked the accuracy against a usgi lensatic compass and a phone app. It and the later british m73 and m88 prismatic compasses were also marching compasses since they were used by military personnel to navigate from point a to poit d via. I first handled one back in the eighties and was very sad to have to hand it back at end of the exercise. Pyser optics m73 and m88 hand held liquid prismatic compasses. The traditional milspec liquid prismatic compass is currently in service with numerous armies around the world, built to meet the exacting accuracy and high specifications demanded by users worldwide.
Find here information of liquid prismatic compass selling companies for your buy requirements. This afternoon i compared the compass accuracy to my silva, my cammenga lensatic compass and my galaxy s4 phone. Jul 22, 2017 francis barker mk iii prismatic compass restoration of a vintage marching compass there are many tragedies that can befall a mechanical watch. It is a very fast, synthetic view of a job that actually takes. Not quite the same thing i know but a very good bit of kit which will do all that the prismatic will do. Uses of prismatic compass the prismatic compass is a small instrument which is held in the hand for observing, and is there employed on the rougher classes of work. It is shock resistant, and built to withstand the roughest and toughest conditions you are likely to encounter anywhere in the world. The mkiii has a flipup prism, so it is a prismatic compass. M73 liquid prismatic compass adalah sempurna, instrumen ketepatan dari sebagian besar konstruksi kuningan, yang dirancang bertahan pada kondisikondisi iklim yang paling berat. The m88 liquid damped prismatic compass is a robust, precision instrument made in the united kingdom for military use.
M 73 liquid prismatic compass adalah sempurna, instrumen ketepatan dari sebagian besar konstruksi kuningan, yang dirancang bertahan pada kondisikondisi iklim yang paling berat. The m 88 liquid prismatic compass is built to the same exacting standards as the m 73, but is made largely from aluminum alloy making it very lightweight. Oct 08, 20 prismatic means that you flip up a small prism and use it to read the bearing on the compass while youre sighting. The m 88 liquid damped prismatic compass is a robust, precision instrument made in the united kingdom for military use. A wide variety of prismatic compass options are available to you, there are 271 suppliers who sells prismatic compass on, mainly located in asia. The m1938 compass, prismatic has a similar design to the early lensatic compass but its cylindrical case stands higher and is not squared off with a ruler edge like the later lensatic compass models, it has some type of liquid inside. Since we strictly limit the group size, the price remains the same for nonphotographers. This m 73 francis barker tritium liquid damped prismatic compass is considered by many to be the best handheld military compass in the world. It is designed for day and night use, with five selfluminous tritium light sources enabling full nighttime operation. Tempestini systems m73 black liquid prismatic compass mils. Difference between prismatic compass and surveyor compass in surveying duration.
Find your own way vintage mkiii marching compass part 2. Also used the pyser m73 degrees black liquid prismatic compass and mils a lot. Since 1848, pyser optics have been manufacturing the finest, highest quality range of liquid prismatic compasses in the world. The m73 liquid prismatic compass is a robust, precision instrument of predominantly brass construction, designed to withstand the most arduous climatic conditions. Milsurps knowledge library compass, prismatic, mk3 by. This lovely chap, stuart, will repairrefurbishclean a stanley g150 prismatic compass for a reasonable price. The case cover should be pointing toward the top of the. The compass is fabricated from solid brass, aluminum and glass to withstand the.
British made, these are standard issue to uk armed forces and were used in iraq and afghanistan. Sep 27, 2009 silva do a model 546400b aka 454 prismatic compass which does not actually have a prism it has a sighting lens allied with a mirror in the capsule and a proper compass card rather than just a pointer. Produced for the directorate of army kinematography by publicity picture pr. Made of high strength engineering metal and covered. Current models of handheld prismatic compass are the m73 and m88. Francis barker m73 prismatic compass bushcraft usa forums.
Can be used for positioning, orienting on a map, plotting and so on. In the center of the compass box, is a pointed steel pivot is used. M1950 dry lensatic compass currently made by cammenga gets a lot of. The m88 liquid damped prismatic compass is built to the same exacting standards as the m73, but is made largely from aluminium alloy making it very lightweight. Prismatic means that you flip up a small prism and use it to read the bearing on the compass while youre sighting. An automatic lifter along with reflecting mirror is fitted. Military and outdoor equipment, tents, ponchos, sleeping bags, cookers, torches, navigation, multitools, watercarrying, survival guides, firstaid and safety. The dial assembly is mounted in a liquid filled sealed capsule designed to allow the full servicing of the compass to sub.
Eventually i obtained my own and i thought i would write a few words for people that have. Vancouver tactical supplies m88 liquid filled prismatic. The m 88 liquid prismatic compass is built to the same exacting standards as the m 73, but is made largely from aluminium alloy making it very lightweight. Prismatic compass definition of prismatic compass by. An excellent francis barker m88 military prismatic marching compass, boxed and in mint condition. Francis barker mk iii prismatic compass restoration of a vintage marching compass there are many tragedies that can befall a mechanical watch. The francis barker traditional military liquid prismatic compass is currently in service. A lot of compasses are called prismatic when they are not.
937 1519 881 21 1420 1283 974 1038 1020 1562 76 43 1296 277 1489 567 1124 1294 718 1142 950 1345 67 511 748 713 207 715 167 133 373