5.


A vessel is ½ mile due south of the South Cardinal Mark off Dymond Reef. From this position a course of 235°(C) is maintained for an hour at a boat speed of 8.0kts.


a) Plot the DR position and compare it to a satellite derived position, 45°43´.19N 006°23´.90W, plotted at the same time. b) What distance is there between the DR and the satellite position? Now factor a leeway of 10°, due to a strong southerly wind, and a tidal current of 349° 2.0kts into the plot.


c) Plot the EP d) What distance is there between the EP and the satellite position? e) What reason(s) could there be for the difference between the EP and the satellite position?


32


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