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AOFAR AF-4580 Manual

Lensatic sighting, waterproof and shakeproof with map measurer distance calculator, pouch for camping, hiking
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Summary of Contents for AOFAR AF-4580

  • Page 1 - 1 -...
  • Page 2 1．COMPONENTS NAME 1．Lid 2．Window with Aiming line 3．Hinge 4．Arrow No1 5．Scale (Centimeter Ruler on opposite side) 6．360° Rotating Bezel 7．Heavy-duty zinc Die-Cast 8．Spirit level 9．Holding Ring Glow-in-the Dark Circle 10． （Fixed tip point ） 11．Glow-in-the Dark Arrow No2 14． Aiming Point 12．360°compass card（Thermoelastic Liquid-Filled 15．Sighting Lens with Adjustable Diopter 16．Conversion chart:Angle /Gradient/Distance...

  • Page 3: Product Specification

    Product specification 2． Model AF-4580 The compass consist of a Zinc alloy housing and a metal lid(1) with a glass window with the Aiming line etched into it.The Color Army green window is attached to the compass housing by a vertical spring...
  • Page 4 Use tips 3． Move the the lid(1), adjust the lid either up or down until the Aiming Point(14), aiming line (2) and the object on a straight line.While doing so keep the compass exactly horizontal by using the integrated spirit level(8). By skillfully handing the compass the Arming line(2) corresponds to the Aiming Point(14), thus ensuring that eyes,compass dial and object are at same level and resulting in utmost accuracy.This method allow to read the...
  • Page 5 5．Walking a given bearing or direction of travel When the bearing is known, simply look at compass card(12)and turn your body until you can read the known bearing on the dial. The sighting line then intersects the object. 6．Orienting the map For more complicated operations to be camied out on the topographic map, it is necessary to orientate the geographic north of the map with that magnetic of the earth .
  • Page 6 c) Read the value of marching direction on the compass card (12) which corresponds to the index line of the Glow-in-the Dark Circle(10) . d) Remove the compass from the map ,look at the compass card (12)and turn around until the value of your marching direction(defined as described point C ) e) Find an auxiliary destination point which must be on the same survey line and start following it .

  • Page 7: Measuring Angles

    Map Scan:1:25000 Distance(M) =Distance (mm)on the map X 25000÷1000 Map Scan:1:50000 Distance(M) =Distance (mm)on the map X 50000÷1000 10．Measuring angles Measure the right side of the object . Keeping in mind the value in degree that you defined ,slowly orientate the compass towards the left side of the object.From the first value in degree deduct the second value you just defined .
  • Page 8 1/30 1/20 2/30 7/80 1/10 3/10 7/10 - 8 -...
  • Page 9 9/10 1+1/5 Ⅰ Ⅱ Ⅲ Ⅳ 11．Measure the distance on the ground In accordance to the principle mentioned under point 9 10 ,it is possible to define the distance on the ground between two well-visible points on the ground. For example ,you can measure the width of a farm house ,the length of a bridge,etc.There is one necessary condition to measure the distance from your own position to that of the object:the line running from these two positions must be as perpendicular as possible to the side of the object to be measured.
  • Page 10 12．Determining the distance to an object of known width If the height or width of an object is known or drawn from a map,it’s distance will be defined by simply inverting the calculation mentioned above the description in point 9 10 and11 . In other words ,if the width of an object with an angle of 8,is 1/7 of the distance according to the table 2 ,the same will be reverse case , the distance is 7 times wider than the width or height.
  • Page 11 Measuring line First object Second object The glass cover with the aiming lines ,is provided with notches which allow you to measure the distance from an object when the distance between the target and another visible object on the same level of the observer on the horizontal line of the glass .
  • Page 12 Make sure to be always far from magnetic fields created by iron parts ,magnetic cores or electric wires which cause the compass to show wrong values. Prevent your instrument from falling or getting damaged and never tamper it (so as to keep your guarantee always valid) 15．Contact us info@aofar.com engineer@aofar.com service@aofar.com URL : www.aofar.com - 12 -...