Kinds of compasses
Basic type compass: a type suitable for beginners to use, has the basic functions that the compass should have, and the price is cheap, but it lacks some convenience and auxiliary facilities such as adjustable declination and aiming. Mirror and the like.
Professional compass: It is a type of full-featured use. If you are an outdoor player who already has a compass use technology, you might as well spend some money to purchase this type of compass with multiple assistive devices that will allow you to It is more convenient to use the north needle to determine the direction.
Decorative compass: This type of compass is often used as a key ring or with a watch. The compass itself usually does not have a bottom plate that can be placed on a map. Most of their functions are able to quickly point out the general direction of the North, but it is impossible to point out the remaining directions very accurately.
The north arrow's component introduction (basic type)
Magnetized needle? At the end of the pointer, the red part is usually used to indicate the direction of magnetic north, not the direction of the north of the earth. The position of the magnetic north of the Earth and the position of the true north are more than one thousand miles apart; therefore, in use, the deviation angles between magnetic north and true north must be adjusted against the map to obtain the correct direction or position.
A liquid-filled, sealed-filled capsule? The needle-case should include a magnetic needle, a magnetic needle bearing, and a liquid. The liquid is used to protect the magnetic needle from collision with the needle box and reduce the amount of movement of the pointer in the reading direction. Rotating azimuth ring? Rotating azimuth ring? The angle of 0 to 360 is engraved on the disc, usually 2 degrees. The scale is scribed around the outside of the needle box. Azimuth is where you should go.
Base plate? A rectangular plastic plate, usually placed underneath the needle box, allowing the compass to be placed on the map for easy reading. The better floor is also accompanied by a scale of inches and centimeters, which can be used to measure the distance on the map so that the actual distance can be calculated against the scale on the map.
Fixed magnetic orientation lines: Fixed orienting arrow and Parallel meridian lines: The magnetic north positioning line is located at the bottom of the needle box and can rotate with the disc. When positioning, it matches the map with magnetic north. The parallel longitude line is parallel to the magnetic North positioning line and can assist the magnetic north positioning line to mark the correct north.
The “Index line†or the “direction-of-travel line†is set on the floor to indicate the direction in which it should travel.
The compass component introduction (professional type)
Adjustable declination line? Declination Adjustment? In every outdoor activity, the declination must be taken into consideration when positioning the compass for the first time. After adjusting with an adjustable declination, each subsequent use The north arrow, as long as the magnetic north is aligned with the line, the forward direction line on the floor will indicate the direction that should be advanced. It is not necessary to consider the difference in magnetic declination for each positioning.
Magnifying lens? Magnifying lens? Is slightly smaller than a normal magnifying glass. It is used on the floor to observe tiny symbols on the map.
Sighting mirror is very easy to use when aiming at distant targets. It can also be used as an annunciator and personal mirror.
Luminescent indicators? Luminescent indicators are usually placed on a magnetic needle, and there are luminous indications on the aligned arrow lines even at four azimuths on the needle box.
The tilt meter Clinometer can be used to measure slopes; to predict the risk of avalanches or the height of destinations.
The short cord, Lanyard, allows you to tie it to your backpack or belt for easy carrying.
Which type of compass is suitable for your needs?
Basic type compass: The basic type of North is enough for general beginner users unless there is a strong desire to improve their ability to a higher level. Generally, casual people engaged in field activities seldom stay away from existing trails. Therefore, the basic type of compass with a general price is already very suitable. As for professional type compasses with some special functional designs, although it is convenient to use, But for users who play only occasionally, there is not much difference.
Professional compass: A professional compass, the function of adjustable declination is one of the essential features, if you are often active in outdoor areas with fewer people, spend some money to buy with adjustable The compass of the declination function is worth it. In addition to the sight function is also a good choice.
Pay attention to the use and storage of the compass
Metal objects can affect the interpretation of the compass. Therefore, when positioning or interpreting directions, try to keep away from vehicles, cameras, or other metal objects. Metal interference can affect the interpretation of the compass from 20 degrees to 60 degrees, so be sure to pay attention. The magnetoelectric area will affect the accuracy of the compass.
When storing the compass, pay attention to the storage location. Do not place it in a place full of electromagnetic effects. For example, don't put it on top of a speaker speaker. The electromagnetic field above the speaker is very strong. In addition, exposure to sunlight will weaken the magnetism of the magnetic needle, and it is not good for the north needle.
The four directions of the compass: East, South, West, and North, are often referred to as azimuth base points.
The short cable attached to the compass can be tied to the belt, jacket, and backpack. It should not be hung on the neck as far as possible. It is prone to danger when engaged in technical climbing.
A compass with no bottom plate is not suitable for mountaineering because it cannot be used with maps.
To use the compass to find the route, the compass itself should be accurate to 1 to 2 degrees.
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