Stainless steel compass compass compass outdoor Mini diameter 75mm

[name] large compass

[material] stainless steel metal shell

[Specification] diameter 75mm, high 12mm

[weight] 100 grams

[carry] handheld

[display] compass

[function] basic orientation

[usage]

stainless steel scale meaning: digital compass

"south" is 180

"North" is the 0 (or 360)

"East" is 90

"West" is 270

English letter: meaning

East E (East)

West W (West)

South S (South)

North N (North)

NE SE SW the northeast, Southeast, southwest, northwest of NW

red arrows point to the "south" in the direction of rotation of
compass, when the pointer stabilized, red end always refers to the north, and then gently rotate the compass, the letter "N" and the red arrow (direction), then contact the compass direction of other letters is corresponding to the actual range, so you can distinguish the four corners of the world, and also, determine the angle in any direction and North or the other direction, the dial can be read.

[method]

The first step: the compass horizontally, still a red compass, pointing direction is "south"

The second step: slowly turn the compass, until the red end and the scale of the "south" coincidence

The third step: the direction of then dial marked direction is the actual

Note: magnets and iron objects will affect the accuracy of the compass, please do not be near a magnet compass (such as audio speakers) or iron (tool) articles.

[] maintenance

1. use and do not close to the magnetic compass placed objects, high voltage wire and electromagnetic device

etc, so as to avoid errors and reduce the sensitivity of the compass.

2. when not in use, should be placed in ventilated, dry place, so as not to mold.

3. the surface dirt, white cloth to wipe the surface available, in order to maintain the smooth surface.

[on] compass

compass is used to determine position of a simple instrument. The predecessor of the compass is one of the four great inventions of the ancient China ian. The main components are mounted on a shaft can freely rotate the needle. The needle can be maintained in the tangent direction of the magnetic meridian in the magnetic field. Needle points to the geographical North pole direction can be identified by this performance. Used in navigation, geodesy, travel and military affairs.

earth is a big magnet, the geomagnetic South Pole in the geographic north near the geomagnetic north near Antarctica in geography.
compass magnetic force in the earth's magnetic field effect, so it will guide the north end end. Compass: history of attention of solar activity, has the title
compass -- areas of the Northern Hemisphere from the magnetic north pole is close, and professional graphics need to consider the geographic north and magnetic north pole angle (declination), so now most of the compass call. The two is a thing.

Be sure to hold the compass level, in order to avoid the occurrence of needle disorder, should keep a certain distance with barbed wire, high voltage wire, automobile and aircraft and containing magnetic objects.

[knowledge] excerpts compass

compass refers to the geographic South Pole is the geomagnetic north compass is used to determine position of a simple instrument.

compass predecessor is one of the four great inventions of the ancient China ian.

main components are mounted on a shaft can freely rotate the needle.

needle can be maintained in the tangential direction of the magnetic meridian in the magnetic field.

needle points to the geographical North South direction can be identified by this performance.

commonly used in navigation, geodesy, travel and military etc..

The invention of the compass is our working people, understanding of the magnetic objects in the long-term practice results. Because of productive labor, people are exposed to magnetite, began to understand the magnetic properties of . It cited the first to discover the magnetic properties of iron. later found that the directivity of the magnet. After many experiments and research,

finally invented the compass can be useful.

The direction of the principle compass

earth is a big magnet, the geomagnetic South Pole in the geographic north near geomagnetic north near Antarctica in geography. The compass in the earth's magnetic field by magnetic force

role, it will guide the north end end.

[operation]

1. azimuth measuring

launched a compass, which makes the scale and direction of rotation of the orientation frame index range on the glass phase of , will head up the diagonal mirror (45 degrees) at the target by monocular sight, from the flat mirror to see needle Arctic on anti card range partition table, can be read out, azimuth. Then turn the scale line azimuth orientation frame glass and magnetic needle polar alignment, clamp the directional index and range glass scale line horn is direction angle (clockwise direction calculation).

open compass, marking the map (range can be calibrated on the map, map) based on time inserting a needle, the ruler edge rotation compass tangential to the target point, to judge the read-out reference point to the target point azimuth.

Calibration of 2. map

launched the compass, the direction of rotation frame, the scale line box on the range and direction of the word refers to standard alignment (note declination correction), compass flat on the map, quasi star map end toward the Arctic, coordinate foot ladder and map the magnetic meridian tangent, rotation map make the needle pole alignment the scale line range on the glass, the map is calibrated.

[introduction] compass

compass department senior professional geomancy compass, is any a Fengshui enthusiasts first compass, will Feng Shui required content of all show, making precise material quality, have a certain weight, feel good, is a good tool for Fengshui enthusiasts heart it . Easy to carry, elegant style, is a necessary tool of building, surveying and professionals.

"compass" is also called "compass", is an important tool for the Chinese Ching feng shui master of the expert towering. Today, not only in the world of overseas Chinese Fengshui popular, but also by foreigners' attention. People often have to turn down the compass najib. No matter any martial art of the compass, with a large number of two Yin and Yang, can be said to be a very powerful. Compass is the power of with congenital acquired gasification invisible evil, it has three properties: the best points out the house and fortune.

Outdoor camping supplies multifunctional portable compass compass table mountain American travel

authentic military products, the whole world is alloy material, more than ten million copies, with high precision, can adapt to outdoor climbing.. wild desert adventure and a variety of difficult conditions necessary for.
(full shot, wysiwyg. ) product name: outdoor camping compass
product size: 8.5*6.5*3CM
accessories: Oxford manual hand rope bag

[1.]
structure and performance measurement of body position:
by compass, as door and bead etc.. The azimuth dividing outer ring is divided into 360 degrees, the minimum value is about 2 degrees, the inner ring is 60-00 0-20, and the minimum value is close. Conversion of density and degree.
measurement accuracy: + 0-10 mil + 1 ~ 2.
distance assessment:
by as door and bead etc.. The angle between the tip and the two star center line according to the door was 1-00 mil, two tip length between 12.34 mm, according to the door and bead length between 123.4 mm, the composition ratio of 10:1 ranging estimater.
measurement precision is 5%
3. pitch angle measuring mechanism:
by pitch table card, pitching, head mirror etc. its range is 90 degrees.
measurement accuracy + 2.5 ~ 4.
wedges:
by coordinate perpendicular to the long side and short side ruler ruler ruler, 120 mm long.
measurement accuracy: + 0.5 mm
[] 1. operation
azimuth measuring:
launches the compass, the direction of rotation frame which makes the scale line azimuth on the glass and the direction indicator relative positive, will head up the diagonal mirror (45 degrees) at the target by monocular sight, from flat mirror reflection to see the needle N the table board of the anti polar range partition can be read out, the azimuth angle, and then with the right hand rotation orientation frame which makes the scale line azimuth on the glass and N pole needle clamp at the direction of alignment, index and azimuth angle of glass scale line is the target azimuth angle (clockwise direction calculation).
open compass, calibration map (ranging can be calibrated on the map map), a needle inserted at the reference point, turn the compass, the side edge of the ruler is tangential to the target point, you can interpret the reference point to the target point azimuth.
map:
launched 2. calibration of compass, azimuth rotating frame, to align the scale line box on the range and direction of the word index (note declination correction), compass flat on the map, map the sight end toward the Arctic, coordinate and map the magnetic wedges long tangent to the meridians, the magnetic pole N at the scale line on the glass rotating range map, this map is calibrated.
3. marching direction to the target:
masking launched compass on the map, so that the foot after the map I stand and March target, then the direction index refers to the direction of the road should be. The direction of rotation on the glass frame so that range (S, N) and direction on the map (S, N) direction, then record the direction index refers to the azimuth reading, facing the direction index picked up the compass rotating body, the magnetic pole N is aligned with the scale line range on the glass, this time through the sight as door forward the object in this alignment, the alignment (such as trees, houses etc.) can be used as auxiliary target marching direction, to the forward recognize target auxiliary. The compass is closed in the bag, but not the direction of rotation to the auxiliary frame, to find a new target to assist the target to continue to move forward, until the destination along the way, should always check the direction of reading.
4. known target interval estimation to the distance between the target stand point:
through the door and around two as star tip target, according to the ratio of the distance of the target for sight about two tip width between the proportional formula of 10:1 estimation of target distance.
target and standing point distance (m) = target interval width (m) x10/ target interval multiple
cases accounted for two of the star tip width: in front of a highway and our position in parallel, for highway distance and position.
poles along the road, the distance between the poles is 50 meters, assessed by the distance is measured about two tip has 5 poles, which accounted for about two per two bar spacing distance between the tip of 1/4 times. Calculated according to the proportion of
distance formula: highway and the position between =50x10x4=2000 meters

using the auxiliary points for the target distance
used as door sight on the target, the direction of rotation frame to make the scale line of magnetic N pole, down the direction index indicating the azimuth reading. Then turn left or right in a right angle direction (i.e. with the original range readingdiffer 15-00) for an auxiliary point, with the step-by-step method or other methods, measure the auxiliary points to stand point distance. In the auxiliary point and compass through the door as the original star at the same target, the direction of rotation frame which makes the scale line alignment needle N pole, down direction index refers to reading. According to the difference between the two and the first reading of the direction angle and the distance from the standing point to the auxiliary point, check the distance of the target can be found in table two.
if more than two times the direction angle reading difference 7-50 (45 degrees), then the target is equal to the distance to the auxiliary stand point point distance.

5. measured elevation:
will rely on face down, with the aim at the door post, through the head mirror reflecting the elevation angle reading; or by surface in a plane, the plane tilt angle measurement.
6.:
height measurement using maps and altimeter height measurement. Check stand point to the target level of the distance from the map, and then to the pitch degree measurement through compass, altimeter found height, can also be used to calculate the trigonometric function. Ask the height from the bottom to the top of the mountain.
from the map and found the standing point of the horizontal distance of 100 meters, with the compass measured elevation is 40 degrees, and then check the height of table 40 degrees in 100 meters, 83.91 meters in height can be.

7. measurement on the map between any two miles:
map of different scales, calculation formula of

1:25000 map the grid side length and field distance: distance (mm = measured number /4) X100 (m)
1:50000 map: distance = (volume number /2 X100 meters (mm) map: 1:100000)
distance = measured number X 100 mm (m)
8.:
declination measuring the earth orientation is not just in the north and south poles of the north-south direction is of the earth, so the magnetic north-south direction, and North and south to have a real angle deviation, the deviation angle is called magnetic declination and its value no one around. Without the need for accurate measurement, the needle can be referred to in the direction as true in the north, the need for accurate measurement, first check the geomagnetic declination, according to compass directions, calculate the north-south direction of the real. As in the Changsha using the compass, check the schedule four Changsha magnetic declination is 2 ~ 41'(W), that is to say in the Changsha needle refers to the north is north west of partial place is 2 DEG 41'. Method for

II any local declination.
launches the compass in the sky at night, the direction of rotation frame, the range of glass (N) word is the direction indicator. According to the door, by sight, head mirror and luminous sign is the North Star, the same compass direction, the compass needle flat, the Arctic is where reading refers to the geomagnetic declination.
maintenance: don't use 1.
and placed near the compass of ferromagnetic objects, high voltage lines and electromagnetic devices, to avoid errors and reduce the sensitivity of the compass.
2. when not in use, should be placed in ventilated, dry place to prevent mildew.
3. head mirror, reverse table board base do not twist, so as not to affect the use of precision.
4. surface dirt, white cloth to wipe the surface available, in order to maintain the smooth surface.