Chart corrections via global communications systems
Abstract
The United States Defense Mapping Agency (DMA) designed the Automated Notice to Mariners System (ANMS) with the hardware and software capability to utilize modern communications systems. ANMS automation speeds processing of printed documents and provides a real-time means of disseminating DMA's chart corrections data on a global basis. It was designed to allow incorporation of new communication techniques such as shipboard satellite communications. The ANMS design allows multiple communication interfaces to be installed on DMA's Prime 400 computer for access to chart corrections data files. The ANMS can support simultaneous remote queries from any or all of the following: a portable terminal calling over a dial-up telephone line from anywhere in the world; a telephone query from a ship at sea which is equipped with shipboard satellite system and a portable terminal; a TWX link; a Telex link; and, data transfers via commercial data transmission networks (under study). Satellite data queries via MARISAT were successfully tested to show the capability of modern communications to obtain chart corrections by mariners while they are still at sea.
- Publication:
-
NASA STI/Recon Technical Report N
- Pub Date:
- December 1981
- Bibcode:
- 1981STIN...8220387G
- Keywords:
-
- Correction;
- Data Transmission;
- Nautical Charts;
- Telecommunication;
- Computer Programs;
- Real Time Operation;
- Ships;
- Spacecraft Communication;
- Surface Navigation;
- Communications and Radar