The use of automatically stabilised aircraft may render a somewhat more accurate location possible, but the utility of such aircraft under polar conditions can scarcely be regarded as established. Broadly, while sextant observations on the ground may be relied upon to give position within, say, one to three miles, aerial observations can only be relied upon to give position within about ten miles, and it is usually necessary to take the mean of a number of readings to secure this result. The limitations of the second case are increased by the known inaccuracy of any form of sextant used in the air. ( The Special Model Goerz Army Binocular of eight power magnification, manufactured by the C.
The first case implies that the flight takes place at the season of perpetual night, and need not therefore be considered. In the consideration of any method of air navigation to the poles it must first be made clear that, even with assumed perfectly accurate instruments and accurate observations with them, astronomical observations from an aeroplane can give an exact position in two cases only: (1) by the observation of two stars (2) by choosing the time of flight so as to render possible simultaneous observations of both sun and moon. Hintze's workshop in 1888 his company started to make. GOERZ 6X30 BINOCULARS W/ Compass Case PLEASE SEE ALL PICTURES FOR CONDITION NICE EARLY BINOCULARS, MISSING STRAPS. Originally Goerz sold mathematical tools for schools, but from 1887 he added cameras.
Hence, astronomical methods must be utilised. Goerz was founded in 1886 by Carl Paul Goerz (1854-1923), a salesman who once had been in apprenticeship at Emil Busch in Rathenow and later was partner of Eugen Krauss in Paris.
On aircraft the latter is not yet a practicable instrument. BNISE 10x50 Binoculars Marine Hunting Rangefinder Built-in Compass Porro. THE determination of position from land or air observations in high latitudes is rendered difficult, apart from conditions of temperature, by the unreliability of the magnetic compass and gyroscopic compass. GOERZ 6X30 BINOCULARS W/ Compass Case PLEASE SEE ALL PICTURES FOR CONDITION NICE EARLY BINOCULARS, MISSING STRAPS, COMPASS. Goerz Berlin Helinox trieder BINOCLE logical details some wear.