Maneuvering Board Fundamentals 1

Maneuvering Board Fundamentals 1 - ManeuveringBoard...

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Maneuvering Board  Fundamentals
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LEARNING OBJECTIVES The student will comprehend the theory of  relative motion. The student will comprehend "bearing drift"  and apply the concept in determining  relative motion. The student will know the correct  terminology associated with the speed  triangle and the relative plot. The student will know the use of the  3 minute rule.
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RELATIVE MOTION Motion Movement of an object from one point to another Relative to some reference point True (Actual) Motion Measured with respect to the earth Relative Motion Measured with respect to an arbitrarily selected object Course  The direction that a ship is traveling (relative to True or  Magnetic North) Also called “Ships Head”
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Relative Motion (cont.) Closest Point of Approach (CPA) The shortest distance from a line of relative  motion to the reference ship (center of  Moboard). Perpendicular to the line of  relative motion. Is identified with bearing, range, and time.
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Own Ship Self-explanatory - your ship
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Bearing imaginary line of direction across the  water (or land)  from  you   to  an object   such as a ship. This imaginary line is also called a  line  of sight . Own Ship (You) Other Ship Line of Sight Bearing
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Bearing Measured in degrees clockwise from a  reference point. Always use three digits to express a  bearing in degrees. 000 ° 090 ° 180 ° 270 °
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True Bearing Measured from true north clockwise to  the line of sight. 000 ° 090 ° 180 ° 270 ° 315 °
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True Bearing 000 ° 090 ° 180 ° 270 ° 135 ° Contact heading does not affect true bearing Own ship heading does not affect true bearing
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Relative Bearing Measured from own ship’s heading  clockwise to the line of sight.
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  • Spring '14
  • Bearing, RM plc, relative bearing

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