Chart Corrections via Global Communications Systems,
DEFENSE MAPPING AGENCY HYDROGRAPHIC/ TOPOGRAPHIC CENTER WASHINGTON DC
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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. Not only does ANMS automation speed processing of the printed document, but, as an added benefit, use of present communications systems provides a real-time means of disseminating DMAs chart corrections data on a global basis. The ANMS was also designed with sufficient flexibility to allow incorporation of new communication techniques such as shipboard satellite communications. The ANMS design allows multiple communication interfaces to be installed on DMAs Prime 400 computer for access to chart corrections data files. For example, 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 available a telephone query from a ship at sea which is equipped with shipboard satellite system and a portable terminal available a TWX link available a Telex link 1982 time frame and, data transfers via commercial data transmission networks under study. Satellite data queries via MARISAT have already been successfully tested to show the capability of modern communications to obtain chart corrections by mariners while they are still at sea.
- Radio Communications