Marine – History
Early Marine navigation was undertaken by the Polynesians creating a chart of sticks based on the current of the seas. In the 9th Century the Arabs had worked out the relationship between the North Star and the horizon had a bearing on where they were on the earth. By the 11th Century the Chinese were beginning to experiment with the use of the earth’s magnetic field for navigation.
To be able to navigate effectively, there are three things our ancestors required, Latitude, time and a good set of charts/maps. A good way of telling latitude was by knowing the angle of the sun or North Star to the horizon. It wasn’t until the invention of the Marine Chronometer in the 18th Century that an accurate way of telling the ‘standard’ time on board a moving ship was possible, therefore mariners were unsure about their longitude.
Marine – Today
Just as important as the invention of the Marine Chronometer, today’s Global Navigation Satellite Systems (GNSS) navigation systems provide information based on the same principles as outlined above. They are designed to provide three primary functions: position, navigation and time (PNT).
GNSS signals enable users to estimate the position of the satellite at broadcast time and measure the distance from each satellite, to determine the receiver’s position.
GNSS data is used for such applications as Automatic Identification Systems (AIS), autonomous vessels, smart buoys, ocean survey and mapping, timing information for the integrated Electronic Chart Display and Information Systems (ECDIS) and Search and Rescue
Marine – How can we help?
With an environment as critical as marine, it is imperative systems on-board marine vessels are of superior quality and reliability. There is no place for a mass produced $10 antenna or $10 receiver.
Antennas and receivers for this environment need to be designed to be rugged, to perform well under the harsh conditions, while still being ‘relatively’ affordable.