User manual BUSHNELL MARINE BINOCULARS 137500

[. . . ] Your model features a liquid-filled compass built into the viewing optics. compass swing stops immediately due to advanced damping design. Compass bearings are called out in easy-to-read precise 1° increments. [. . . ] It has extremely fast damping so that there is almost no `swing' and is corrected for dip (Latitude). The compass scale is in one degree increments and is aligned with the vertical range finding scale. When using the compass, always keep in mind the local variation between magnetic and true north. HOW TO USE THE RETICLE The vertical scale (reticle) visible through the left half of the binocular, above the compass display, allows you to calculate distance to an object if you know its height, or to calculate the height of an object if you know its distance from you. Each mark on the vertical scale has a value of 5 MIL (1 Mil is equivalent to an angle that can determine an object one meter in height at a distance of 1000 meters). Therefore, if a navigation chart gives the height of an object, by sighting on it and counting the number of MILs, you can determine how far away it is. Here are the two formulas: To measure distance when the height Is known: OBjECT HEIgHT (M) x 1000 M = DISTANCE IN METERS SCALE READINg To measure object height when the distance is known: DISTANCE (M) x SCALE READINg = OBjECT HEIgHT IN METERS 1000 5 USING THE COMPASS ILLUMINATOR The BUSHNELL MARINE compass model comes with built-in LED compass illuminator for use at night and in low light conditions. (Incidentally, the compass is built into the left tube of the binocular but the push button control for the light and the battery are located in the right tube. This was done to minimize the chance that electrical interference might affect compass performance. ) When the ambient light does not permit you to see the compass heading clearly, press the button atop the right tube. If the light is dim or does not come on, replace the batteries. If the light does not operate after replacing the batteries, please contact the Bushnell dealer nearest you. HOW TO CHANGE THE BATTERIES To change the battery, use a thin coin to remove the battery cover by turning it counter-clockwise. Be sure to insert the new batteries with (+) signs in the same direction. [. . . ] You may have other rights which vary from country to country. Une échelle d'évaluation de distance permet à l'observateur d'estimer la distance d'objets par rapport à une taille connue. Pour mesurer la distance quand la hauteur est connue : HAUTEUR DE L'OBjET (M) x 1 000 M = DISTANCE EN MèTRES RELEVé D'éCHELLE Pour mesurer la hauteur d'un objet dont la distance est connue : DISTANCE (M) x RELEVé D'éCHELLE = HAUTEUR DE L'OBjET EN MèTRES 1000 11 [. . . ]