About the Book
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Pages: 78. Chapters: Compass, Rotation, Perpendicular, Anisotropy, North, West, East, Relative direction, Galactic coordinate system, South, Toilet paper orientation, Rotation representation, Cardinal direction, Plane of rotation, Extrasolar X-ray source astrometry, Transverse isotropy, Solar compass, Parallel, Port and starboard, Hand compass, Right-hand rule, Rodrigues' rotation formula, Curve orientation, Galactic quadrant, Boxing the compass, Galactic orientation, Clockwise, Screw axis, Luopan, Path integration, Windward and leeward, Bi-isotropic material, Widdershins, Plumb-bob, European Terrestrial Reference System 1989, Sunwise, Northwest, Kamal, Septentrional, Southwest, Northeast, Pelorus, Marching line, True north, Easting and northing, Zonal and meridional, Hydrostatic stress, Handing, Zonal and poloidal, Grid north. Excerpt: A compass is a navigational instrument that shows directions in a frame of reference that is stationary relative to the surface of the earth. The frame of reference defines the four cardinal directions (or points), north, south, east, and west. Intermediate directions are also defined. Usually, a diagram called a compass rose, which shows the directions (with their names usually abbreviated to initials), is marked on the compass. When the compass is in use, the rose is aligned with the real directions in the frame of reference, so, for example, the "N" mark on the rose really points to the north. Frequently, in addition to the rose or sometimes instead of it, angle markings in degrees are shown on the compass. North corresponds to zero degrees, and the angles increase clockwise, so east is 90 degrees, south is 180, and west is 270. These numbers allow the compass to show azimuths or bearings, which are commonly stated in this notation. There are two widely used and radically different types of compass. T...
