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	Second Part - Introduction to navigation
	18° 61,23' N - 061° 13,76'W. Are these coordinates plausible ?       Yes.   No.     The unit used at sea for distances is the Nautical Mile which represents       One minute of Longitude.   One minute of Latitude.     After having calculated a course of 180° I want to give indications to the helmsman. The variation in the area is 10°W. What do I tell the helmsman ?       190°   170°     The variation of the area is to be found       in the compass rose on the navigational chart.   In the almanac.   in the pilot book     Depth soundings are always indicated in meters.       False   True     When using a navigational chart with depth soundings in fathoms and feet, what does a figure like 18,3 mean ?       18 fathoms and 3 feet   18,3 fathoms   18,3 meters   183 feet     The height of the water in the harbour is 5,5m. How much water will I have on a sounding of 2,5 underligned ?       8 meters   5,5 meters   3 meters.     050°N 13,453'N - 002° 56,789'W. Could you confirm these coordinates are reported correctly ?       No   Yes.     Maximum Longitude is       180°   360°   90°   0°     All the points on the same Latitude form the       pole