Japan Radio Offers New Literature On Products— GSC-80 ODARS And JLR-4000 GPS Navigator

Japan Radio Company, Ltd.

(JRC) recently introduced two new products—the JLR-4000 Global Positioning System (GPS) Navigator and the GSC-80 On-Board Data Aut o m a t i c Recording System (ODARS).

The GPS NAVSTAR system with timing and ranging is a completely new system that will eventually use 18 satellites to pinpoint a ship's position and speed anywhere in the world with great accuracy. The system can now use seven satellites now in orbit, allowing measurement of positions for about three to five hours a day. Twenty-four-hour service will be available in about 1987.

The JLR-4000 navigator is said to be one of the most compact and lightweight units in the world, with a unique time-sharing feature. As the GPS navigator receives signals from four satellites to measure a position, four or five receiving channels would normally be required.

However, the time-sharing system developed by JRC permits the receiver to receive the signals from all four satellites on a single channel for instant position fixing. The GPS receiver determines not only latitude, longitude, speed, and bearing— the basic functions—but it can also indicate such navigational data in memory as destination, bearing and distance to destination, required time to it, off-course alarm, etc.

Many optional units, such as a color plotter for color track display, a hard-copy printer for printouts of various data, and a remote display unit for displaying navigational data in a second location can be connected to the GPS navigator.

The GSC-80 ODARS has been developed to meet demands for automated data communications through the INMARSAT from ship to shore. It is an automatic data reporting system to collect various types of onboard information and to automatically transmit the newest data to the shipowner's office ashore via the INMARSAT telex link.

The system consists of a multidata interface and a telex channel interface that are connected to an existing or new INMARSAT ship earth station. The GSC-80 can transmit data to shore using three modes—fully automatic, semiautomatic, and manual. The onboard data received at the shore office is analyzed and processed to send a relevant sailing plan back to the ship.

For free literature describing both new products, Circle 75 on Reader Service Card

Maritime Reporter Magazine, page 45,  Mar 1986 Kansas

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Maritime Reporter

First published in 1881 Maritime Reporter is the world's largest audited circulation publication serving the global maritime industry.