COURSES

TRUE COURSE True course is the angel at the ships between true North and the ships head,that is the angel between the true meridian and the ship's fore and aft line. TRUE BEARING True bearing of an object is the angle at the observer between true North indicated by the meridian and the line joining the observer and the object. DEVATION MAGNETIC COURSE Magnetic...

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EARTH

MAGNETIC MERIDIAN Magnetic meridians are lines joining the magnetic poles of the earth. PRIME MERIDIAN Prime meridian is the meridian which passes through green-which,other meridian are named East or West from the prime meridian Normal 0 false false false EN-US X-NONE SI-LK MicrosoftInternetExplorer4...

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D'lat and D'long

DIFFERENCE IN LATITUDE (D'lat ) The D'lat  between two places is the arc of the meridian or angel at the center of  the earth contained between parallels latitude through the two places. D'lat is named North or south according to the direction from the first place to the second. DIFFERENCE IN LONGITUDE (D'lat ) The D'long  between two places is the shortest arc of the equator or the smaller angle at the poles contained between the meridian through the two places. D'long is named East or West according to direction from the first...

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CELESTIAL NAVIGATION

                                                            ECLIPTIC Ecliptic...

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Direction of the Earth

Direction of the Earth For the purpose of the navigation,direction on the earth surface is measured as an angel from the meridian where the observer is located.There are two commonly used systems for indicating direction 01. QUADRANTAL NOTATION 02.THREE FIGURE NOTATION QUADRANTAL NOTATION The angel measured from North to East or West and South to East or West THREE FIGURE NOTATION  The angel measured clockwise from the North 000  to 360 degr...

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GHA AND LHA

GREENWICH HOUR ANGEL (GHA) GHA of a body is the arc of the equinoctial,or the angel at the celestial pole,measured  westerly from the celestial meridian of Greenwich to the celestial meridian passes through that body LOCAL HOUR ANGEL (LHA) LHA of a body is the arc of the equinoctial,or the angel at the celestial pole,measured  westerly from the observer's celestial meridian to the celestial meridi...

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EARTH

                                                                 Shape of the Earth The earth is not true sphere.It's shape os that of an oblate spheroid,the equatorial diameter being more than the polar diameter. AXIS The axis...

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