Search results
Results From The WOW.Com Content Network
A standard Brunton compass, used commonly by geologists and surveyors to obtain a bearing in the field. In navigation, bearing or azimuth is the horizontal angle between the direction of an object and north or another object. The angle value can be specified in various angular units, such as degrees, mils, or grad. More specifically:
With a local declination of 14°E, a true bearing (i.e. obtained from a map) of 54° is converted to a magnetic bearing (for use in the field) by subtracting declination: 54° – 14° = 40°. If the local declination was 14°W (−14°), it is again subtracted from the true bearing to obtain a magnetic bearing: 54°- (−14°) = 68°.
Earth science – all-embracing term for the sciences related to the planet Earth. [1] It is also known as geoscience, the geosciences or the Earthquake sciences, and is arguably a special case in planetary science , the Earth being the only known life -bearing planet.
Earth science or geoscience includes all fields of natural science related to the planet Earth. [1] This is a branch of science dealing with the physical, chemical, and biological complex constitutions and synergistic linkages of Earth's four spheres: the biosphere , hydrosphere / cryosphere , atmosphere , and geosphere (or lithosphere ).
Science portal; Earth science (also known as geoscience, the geosciences, or the Earth sciences) includes all the sciences related to the planet Earth. It is arguably a special case in planetary science, Earth being the only known life-bearing planet known to Homo sapiens. There are both reductionist and holistic approaches to Earth science.
The magnetic north pole is constantly shifting relative to the axis of rotation of Earth. Magnetism is a vector and so magnetic field variation is studied by palaeodirectional measurements of magnetic declination and magnetic inclination and palaeointensity measurements. Earth's magnetic polarity reversals in last 5 million years.
Earth science (also known as geoscience, the geosciences or the Earth Sciences) is an all-embracing term for the sciences related to the planet Earth. [1] It is arguably a special case in planetary science, the Earth being the only known life-bearing planet. There are both reductionist and holistic approaches to Earth science.
A visual fix can be made by using any sighting device with a bearing indicator. Two or more objects of known position are sighted, and the bearings recorded. Bearing lines are then plotted on a chart through the locations of the sighted items. The intersection of these lines is the current position of the vessel.