A point's bearing is the number of degrees in the angle measured clockwise from the north line to the line connecting the center of the compass with the point. A bearing is a symbol that represents the direction of one location in relation to another. The bearing of A from B, for example, is 065o. Bearing readings are usually taken by placing the end of a carpenter's level against some fixed object and viewing it through the eyepiece. The instrument automatically displays the reading of the level when placed accurately across from its corresponding pointer.
There are two types of bearings: magnetic and visual. With a magnetic bearing, you use a magnetized needle to read the direction and strength of a metal object such as a ship's hull. This method is accurate only if you know where the metal object is located relative to the magnetic north pole. With a visual bearing, you look at two points on the horizon to determine which way is north. This method is less accurate than the magnetic bearing but can be used in any condition.
Bearings are useful tools for determining directions. If you're on land and want to find out how far away a ship is, you could try using the distance between them as their bearing. You would need to know how far apart they are along a straight line, which is called their range. If they are close together, then their bearing will be small; if they are far apart, then their bearing will be large.
A bearing is a clockwise angle calculated from north to south. The bearing of B from A is given below as 025 degrees (note that 3 figures are always given). The angle between A and B is 205 degrees. To find the distance between them, they must both be marked on the map. The shortest distance between two points is along the 90-degree line called the meridian. This is shown in red on most maps. On some maps, such as the National Geographic Society's World Map, more than one meridian is shown. They all meet at the poles.
There are two methods for finding bearings: using a compass or with mathematics. Using a Compass When you need to find a point of reference for your bearing, such as when you're traveling alone and don't know anyone else's direction, use a compass. Hold the compass so its north end points toward north. Then rotate the compass wheel until it is aligned with true north. The bearing displayed on the compass needle is now the bearing you need to follow. Mathematical Methods There are several techniques for calculating bearings without using a compass. The first method uses trigonometry. It involves measuring angles between two points on the map and computing the result by using the law of sines.
The bearing of B from A is stated below as 025 degrees (note that 3 figures are always given). A, B, and C are the names of three ships. It can also be expressed in degrees or as a fraction. For example, 5 degrees = 45 degrees.
There are two methods for determining the bearing of one location from another. The first method uses a compass. It involves noting which direction is north and then counting up or down the compass needle until you reach the number corresponding to the bearing you are looking for. For example, if you were trying to find the bearing of San Francisco from Los Angeles by using this method, you would need to go over 100 degrees on the compass because California is to the north of Los Angeles.
The second method does not require use of a compass. Instead, it makes use of maps and charts. On a map or chart, bearings are usually indicated by arrows. If there is no arrow, you can still determine the bearing of one location from another by using latitude and longitude. Latitude is the horizontal distance from the center of the earth to the point on its surface. Longitude is the vertical distance from the center of the earth to the point on its surface. Bearing formulas are used to calculate the bearing from one location to another. They depend on the type of marker used to indicate the bearing.
Bearings are a measure of direction, with North taken as a reference. If you are travelling north, your bearing is 00 deg, and this is usually represented as straight up on the page. If you are travelling in any other direction, your bearing is measured clockwise from North. The closer it is to 90 degrees, the more accurate the reading is; 0 degrees is dead ahead and 180 degrees is back where you started from.
Bearings can also be expressed as degrees, minutes, or seconds. For example, if your bearing at 1 p.m. was 25 degrees, that would mean you were traveling eastward at a rate of one degree per minute. Or, at midnight on July 4th, when your bearing was zero degrees, you were actually standing still!
The accuracy of a compass depends on how well it is made. If you use its readings to guide yourself directly onto land features or visible stars, they should remain close together over time. But if you rely solely on compasses while hiking, their accuracy can deteriorate very quickly because they are dependent on many factors outside of our control. For example, if you carry a magnetic rock, which most hikers do, then your compass will no longer work properly.