Relative positioning of navigation instruments
Because of the importance of navigation instruments to ensure the safety of navigation, the International Convention for the safety of life at sea and the relevant resolutions adopted by the international maritime organization.
In addition, navigation instruments also include meteorological, hydrological observation, such as barometer, dry and wet thermometer, anemometer, etc..
Instrument for radio positioning of ship. The current range finder, etc. a consol system and Roland, Taiwan card, Omega, transit navigation and hyperbolic system. Each has its own advantages and disadvantages, can be used to complement each other, but can not replace each other. The ideal positioning system has yet to be developed, which requires global, all-weather, self-contained, passive, fully reliable and high precision. Omega and transit navigation system has been called the two great achievements since 1960s of navigation technology, but they are only part of the above conditions. The United States in the late 80s will be officially put into use in the new satellite navigation system, known as the GPS global positioning system. It can be continuous positioning, the accuracy is higher than the meridian navigation system, is the ideal positioning system further new technical achievements.
