Solutions for Calculating Astronomical Triangle

Using"Electronic chart display and information system( ECDIS) "to calculate astronomical triangle not only can improve the calculation speed and precision,but also make officers get easier understanding of the celestial body's celestial coordinates and geographic coordinates with the help of ECDIS's display function.It also comply with the advice of STCW Manila amendment that using calculation software to calculate astronomical triangle.The purpose of this study was to compare existing methods and put forward using ECDIS to calculate astronomical triangle.