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small boat: Distance, Course, Speed and Direction on the Earth's
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Monday, March 23, 2009. Distance, Course, Speed and Direction on the Earth's. Distance, Course, Speed and. Direction on the Earth's. A good compass is an essential piece of equipment. However, it is not much use having a dependable compass but no idea of the proper course to steer to reach a particular destination or how long it will take to get there. Distance on the Earth's Surface. For general purposes, the mile is considered to be 2000 yardsDISTANCE, COURSE, SPEED AND DIRECTION 47. If you have diffic...
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small boat: The Magnetic Compass
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Monday, March 23, 2009. The earliest compasses probably consisted of a needle or double-bow shaped piece of iron or lodestone floated on a piece of wood in a water-filled vessel; alternatively a thin magnetised needle was pricked through a piece of straw which kept it afloat on the water surface. Whichever method was used, it must have been appreciated that the North-seeking force on the needle was weak and therefore an almost friction-free method of suspension was needed. In Figure 2, Position I the ang...
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small boat: March 2009
http://small-boat.blogspot.com/2009_03_01_archive.html
Monday, March 23, 2009. These deviations can be removed by correcting the compass. First study the deviation table produced as a result of the swing, as this will furnish some good clues to the cause of any trouble. The table previously given in Chapter i will be used as an example for this analysis—although the deviations given in that table are not too bad. This is found by taking the sum of all the deviations found during a swing and dividing the sum by the number of headings. CORRECTING THE COMPASS 37.
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small boat: Correcting the Compass
http://small-boat.blogspot.com/2009/03/correcting-compass.html
Monday, March 23, 2009. These deviations can be removed by correcting the compass. First study the deviation table produced as a result of the swing, as this will furnish some good clues to the cause of any trouble. The table previously given in Chapter i will be used as an example for this analysis—although the deviations given in that table are not too bad. This is found by taking the sum of all the deviations found during a swing and dividing the sum by the number of headings. CORRECTING THE COMPASS 37.