A tool for education, makeshift navigation, and rangefinding, the double-sided Wndsn Mini Horary Quadrant Telemeter enables you to do more than merely guessing distances. It lets you measure angular size and compute distance, height or depth of object, altitude, or elevation, it allows computation of sine, cosine, and tangent for a given angle and utilize the baked-in trigonometry to find the desired value by aligning the provided string across the various scales.
The backside features functions derived from ancient astrolabes; a degree and slope quadrant, a shadow square, as well as sine and cosine arcs and an inclinometer scale with horary lines added to the quadrant side, which by now not only enables the user to measure the sun’s altitude on a given date but in addition, to also take the time and visualize daylight hours over the course of a year. By using our string as a plumb line, we enable multiple ways of sighting, plus we let you perform various trigonometric operations with the shadow square and sexagesimal scale, increasing the usefulness of the instrument with the list of applications topping 75 currently.
Using a Wndsn Horary Quadrant Telemeter to determine latitude (at night with Polaris), calculate declination of the day with the respective arc, and a measurement of the Sun altitude (via backsighting), one can derive at least 18 data points and in fact calculate all of them directly on the device.
The best tool is the one you have with you, on you. Wndsn Telemeters are wallet-size distance and altitude nomographs developed in our applied science lab: Wndsn Telemeters combine a thousand years of civil engineering, surveying, navigation, and astronomy in one durable, low tech, high utility instrument that can be brought anywhere, is self-containing, and independent of external, modern technologies. Wndsn Telemeters are naked-eye tools that offer various means of measuring angular size, as well as graphical computers providing functions to process or convert the measured values. Their purpose is to help you navigate using known landmarks or astronomical features, to get a "second opinion" to cross-check values obtained with different means, or in emergency situations when other methods fail or are unavailable.
Made in Germany. [This is the real deal, this is NOT a replica, it's NOT cast or struck -- our instruments are engraved to the highest precision of tools and materials with every scale mark optimized for the size of the instrument based on in-house computer-calculated tables from historical and contemporary mathematical formulas.]
Wndsn Mini Horary Quadrant Telemeter, double-sided
Dyneema string, 0.35 mm turquoise, pre-configured in the required length
Plumb line weight, tungsten carbide (similar to the one pictured)
Wndsn Quadrant morale patch; turquoise & white on black
Printed Telemeter & Quadrant Cheatsheet (in English; German upon request)
[Note: Due to the manual production process, slight variations in finish can occur. The edges are tool edges, they are somewhat "sharp", and are not beveled or rounded. This will wear off over time, and is the hallmark of a pristine instrument.]