true bearing การใช้

• "Ni馻 de Fuego " maintains its true bearing throughout.
• If the true heading is set at the lubber's line, true bearings are observed directly.
• Moreover, all such moral frameworks are no more than passing modes of interpretation that have no true bearing on man s existence.
• Survey station NM / S / 270 lies on a true bearing of 75?49'distant from survey station NM / S / 268.
• By contrast, Compass bearings have a varying error factor at differing locations about the globe, and are less reliable than the compensated or true bearings.
• If the hiker has been following the correct path, the compass'corrected ( true ) indicated bearing should closely correspond to the true bearing previously obtained from the map.
• Some compasses allow the scale to be adjusted to compensate for the local magnetic declination; if adjusted correctly, the compass will give the true bearing instead of the magnetic bearing.
• Relative bearings then serve as the baseline data for converting relative directional data into true bearings ( N-S-E-W, relative to the Earth's true geography ).
• The resulting " true bearing " or map bearing may then be read at the degree indicator or direction-of-travel ( DOT ) line, which may be followed as an " azimuth " ( course ) to the destination.
• Again, if one is using " true " or map bearings, and the compass does not have preset, pre-adjusted declination, one must additionally add or subtract magnetic declination to convert the " magnetic bearing " into a " true bearing ".
• To take a map bearing or " true bearing " ( a bearing taken in reference to true, not magnetic north ) to a destination with a protractor compass, the edge of the compass is placed on the map so that it connects the current location with the desired destination ( some sources recommend physically drawing a line ).
• A " true bearing " is measured in relation to the fixed horizontal reference plane of true north, that is, using the direction toward the geographic north pole as a reference point, while a " magnetic bearing " is measured in relation to magnetic north, that is, using the direction toward the magnetic north pole as a reference.
• Other features found on modern orienteering compasses are map and romer scales for measuring distances and plotting positions on maps, luminous markings on the face or bezels, various sighting mechanisms ( mirror, prism, etc . ) for taking bearings of distant objects with greater precision, " global " needles for use in differing hemispheres, adjustable declination for obtaining instant true bearings without resorting to arithmetic, and devices such as inclinometers for measuring gradients.