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Departure Calculation Presentation by Selçuk NAS

This presentation explains the calculation of departure in nautical miles between two meridians along a parallel in office XP format. Contact: snas@deu.edu.tr

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Departure Calculation Presentation by Selçuk NAS

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  1. Pn Pn D F E F D E A C C B β A B DEPARTURE β β β Prepared by Selçuk NAS This presentation is required office XP

  2. = DFE ACB // CB FE CA FD // ~ DE DE DE DE D F E A C B β AB AB AB FE = CB FE = dlong r = = Lat0 CB CE r = dlong A → B // Cosβ . r = = = DEPARTURE dlong . Cos Lat dlong β0 r = FE = Cos β Cos β . r FE CE RESEMBLANCE BETWEEN TRIANGLE (A C B) AND TRIANGLE (D F E) Pn F D E β C A B

  3. A B DEPARTURE The distance in nautical miles measured along a parallel due EAST or WEST between two meridians Pn Long A Long B

  4. B A distance dlat Pn Lat B Lat A Long (AB) distance= dlat dlat= Lat A – Lat Bdlong= 0 departure= 0

  5. A B distance departure dlong Pn Lat (AB) Long A Long B distance= depature dlat= 0 dlong= Long A – Long B departure= dlong . Cos Lat

  6. B B A A departure B distance dlat C dlat C C departure departure departure A Mid Lat dlong dlong Pn Lat B Lat A Mid Lat Long A Long B distance = dlat / Sin C0 = dep / Cos C0 dlat = Lat A – Lat B = dep . Tan C0 = dist . Sin C0 dlong = Long A – Long B = dep / Cos Mid Lat departure = dlong . Cos Mid Lat = dlat / Tan C0 = dist . Cos C0

  7. A B Pn

  8. THIS PRESENTATION WAS PREPARED BY SELÇUK NAS E MAIL : snas@deu.edu.tr Mobile Phone : 0 532 331 51 31 Phone : 0 90 232 278 22 30 Adress : Dokuz Eylul Universitesi, Deniz İsletmeciligi ve Yonetimi Yuksekokulu, Kaynaklar Yerleskesi, Buca, Izmir, TURKEY

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