Samyung NAVIS 5100 Instruction Manual

Contents

Samyung NAVIS 5100 Instruction Manual Manual pdf 6 page image

61. GPS OverviewThe Global Positioning System is based on a radio navigational system using satellites. Anunlimited number of users are provided with accurate three-dimensional positions. This24/7, worldwide coverage, is available under any weather condition.GPS can provide two-dimensional and three-dimensional position information. 3Dpositioning is mostly used in aircraft or other applications requiring latitude, longitude andaltitude. The 3D mode requires a lock on 4 satellites to accurately acquire the position.Surface vessels use 2D positioning, as only latitude and longitude is needed. In 2D mode,positioning requires a lock on only 3 satellites to accurately acquire the position.Once the GPS Plotter has received an accurate fix from the satellites, ship’s position,bearing, time, speed and other operations can be calculated.GPS(Global Positioning System) has two types, 3 Dimensional and 2 Dimensional.3D positional data has been sued in aviation, which requires Latitude, Longitude andHeight.To provide 3D positional data, the system requires 4 satellites.2D positional data has been used in vessel/ship navigation, which requires only Latitudeand Longitude.To provide 2D positional data, the system requires 3 satellites.GPS provides an accurate positional data by receiving satellite signals.GPS chartplotters provide ship position, bearing, time, speed and many more.Furthermore, plotters provide information for navigation and other data on the mapsuch as latitude/longitude, tracks, waypoints, event marks and more on high-resolutionLCD.