Color: Army green material: High-level engineering and metal (paint) closed size: 6.5*5.3 * 2.6CM dial diameter: 55MM
Weight: 200G about whole configuration: Guide (North), portable canvas bags, army green harnesses, specification, carton packaging.

Performance features]]

1. The use of high-strength engineering metal matrix, strong light, may be subjected to a variety of harsh environment test.

2. The oil type waterproof damping dial completely waterproof design, harsh environment pointer as stable.

3. Equipped with a portable canvas pocket portable.

4. Azimuthal survey mechanism with precision up to 1 degree.

5. As the door sight distance assessing the accuracy can reach 3%.

[Precise measuring mechanism]]

1. Pointer gear odometer, measurement accuracy ≤ ± 1 ° 2. Fine? Pulp yarn? 0.5MM do standard ladder feet

3. Operating Temperature:-20 ℃-+50 ℃

What is a glow-in-the-dark: light energy storage glow in the dark powder is phosphor subjected to natural light, sun light, ultraviolet light, such as exposure to optical energy stored in the stop after light irradiation, slowly to fluorescence of the released, so at night or dark, can see the glow, lasts up to a few hours to more than a dozen hours. So, pro-it is to be noted that no storage of light energy is not luminous effect of 

  Maintenance and maintenance methods:

Operations Guide:1. The measured azimuth angle: expand the North Arrow, rotational orientation box gives orientation on the glass of the tick marks and direction opposite those water quality objectives are, the flat mirror diagonal (45 °) monocular by sight pointing to the target, from the mirror reflection see magnetic N pole on the gender dimensions of fan zi biao pai on orientation partition, can read the target azimuth and right-handed rotational orientation box gives orientation on the glass of the tick marks with the magnetic N pole aligned, at this point the direction indicators orientation glass tick subtended Horn is the target azimuth (clockwise direction). Open compass calibration good map (ranging don't calibration map) in the figure at the reference point inserting a needle rotating compass to side feet edge cut in point, can be sentenced to read reference point to the target point of the azimuth.2. The calibration map: expand the North Arrow, rotational orientation block so that the orientation of the frame on the tick marks word with the direction indicators alignment (note of geomagnetic declination correction), Compass flat on the map, star end towards the map in the Arctic, the coordinates of the ladder feet long and map magnetic meridian tangential to the rotation of the map so that the magnetic N pole aligned orientation on the glass of the tick, the map that is calibrated.

3. Please, to mask the target travel of the marching direction: expands the North arrow on the map to surveying and mapping feet after the map I foothold and March target, direction indicator means should be the direction of travel of. Rotational orientation box gives orientation on the glass of the (S, N) direction on the map (S, N) in the same direction, and then note the direction indicators refer to azimuth reading, facing direction indicators pick up the North Arrow rotating body, the magnetic N Pole orientation on the glass of the tick marks aligned at this time by the star as the door forward alignment, this alignment line of each object (such as Woods? ⒎ class caryopteris caries ┒ ji spoon chi 🕛 core  higher species mother ㄖ ✂ survey cou  xian Ning ㄖ ✂ survey gan du pure what disaster  AO ➡ =  Deputy closed du Torr mega horn Krypton  mound   hu 🎾 car huan Ying  sauce curium ㄖ ✂ survey gan du pure slightly jiao B huang inform the ㄖ ✂ survey tan Taeniasis AO ⤴  barium jiao AO-Xin-Xue-Kang and herders fang 💎 terrier covid-19 😌?

4. Estimate the distance between the target and the standing point according to the known interval of the target:
①The as doors and star left tip targeting on the basis of the target of interval occupied star left tip width between a multiple of 10:1 ratio is applied to estimate the distance to the target.
The target and standing point of the distance (M) = target interval width (m) x10/target interval accounted for star two cutting-edge width of the multiple
Example: front there is a road with our positions parallel, highway and position the distance.
Along the road pole Rod inter-distance is 50 metres, with distance assessed the measured left tip has a pole 5 root, that is, the interval between each two poles accounts for 1/4 of the distance between the left and right ends. According to the proportion of formula:
Distance between Highway and position = 50x10x4=2000 m

② the use of auxiliary point to the distance to the target
Aim at the target with the sight of the door, rotate the azimuth frame to make the scale line to the N pole of the positive magnetic needle, and write down the azimuth reading indicated by the direction index. And then to the left or right right angle direction (that is, the original azimuth reading phase difference 15-00) looking for an auxiliary point with stepped method or another method measured auxiliary point standing point of distance. In the auxiliary point with the North Arrow by photo door star alignment of the original target, likewise rotated orientation box gives tick marks aligned magnetic N pole, note the direction indicators refer to reading. According to the before and after the two direction angle readings difference between the standing point auxiliary point of the distance check in the Second Schedule to the available range of target.
If the difference between the above two directional angle readings is 7-50 (I .e. 45 °), range of target equals the distance from the standing point to the auxiliary point.

5. The measured pitch angle:
Would rely on the face-down, as the door Star targeting by flat mirror reflected pitch readings; Or by surface was established in a certain plane, measuring the plane angle of inclination.

6. Height measurement:
Use maps and altimeters to measure altitude. From the map Chad standing point target, as well as the horizontal distance between a then compass measured pitch degrees by altimeter detected height can also be trigonometric function is calculated. Example: to the bottom of the mountain to the top of the mountain height.
From the map find out the top of the hill with the standing point of the horizontal distance is 100 m with compass measured mountain elevation angle of 40 ° and then consult our altimeter at 100 meters control 40 °, available with a height of 83.91 metres.

7. Mileage between any two points on the Geograph:
Different scales of map, fang li wang side and on-the-spot distance relationship calculation formula
1:25000 map: distance = (measured mm/4)X100 (meters)
1:50000 map: distance = (measured mm/2) X100 (meters)
1:100000 map: distance = measured number of millimeters X 100 (meters)

8. The magnetic declination measurement:
the Earth's north and south magnetic pole orientation of not just the earth of the north-south direction, so magnetic needle referred to in a north-south orientation of the truly a north-south orientation of a deviation angle, this deviation angle is referred to as the magnetic declination numerical vary from place to place. Without the need for accurate measurement, you can turn off the needle in the direction indicated by regarded as a true north, need to accurately measure, just consult the local magnetic declination books, and then according to the north arrow in the direction indicated by, to calculate the real north-south orientation of. Such as in Changsha use compass, check Schedule IV of Changsha magnetic declination is 2 ° 41 (W), that is to say in Changsha magnetic needle referred to in the North is just north of West partial 2 ° 41 of the place.
② anywhere declination method.
In The Sky at Night, compass, rotational orientation block so that the orientation of the silicon-on-glass (N) word is the direction indicator. With photo door, star, flat mirror and noctilucent sign zhi zheng on Polaris, constant compass direction will Compass flat the magnetic North Pole within the meaning of the reading is where the magnetic declination.

Maintenance:
1. Do not approach ferromagnetic objects, high-voltage wires, electromagnetic devices, etc. when using and placing the North compass, so as to avoid errors and reduce the sensitivity of the compass.
2. When not in use should be placed in ventilated and dry place, so as to avoid moldy.
3. The flat mirror, fan zi biao pai seat do not twist, so as not to affect its application performance.
4. The surface fouling is available in white cloth gently wipe the surface to keep the surface bright and clean.