The Radar Navigation Module 2.1 (RNM 2.1) has been designed for solving of a wide range of navigational tasks. Together with the dKart Navigator electronic chart systems RNM 2.1 provides means for displaying of a full radar image atop of an electronic chart. The possibility of simultaneous/separated monitoring of the ENC and radar image let a navigator take bearings in narrow waters and unfamiliar navigation areas easily. Also an "overlaying" of radar image over the ENC provides a handy tool for visual control of navigation systems thus increasing the reliability of the whole complex.

Radar Navigation Module 2.1 has been designed for reception and real-time digital processing of transceiver analog signals incoming from different type radars. The RNM 2.1 consists of a software and a hardware components.

The software package of this module is implemented as an independent application controlled by the Microsoft Windows NT 4.0 operating system.

The RNM 2.1 hardware component has been made on the basis of AT-ADSP062 board developed by the DSP Laboratory of PROPGNOZ Research Institute.

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• full compatibility with all range of dKart electronic chart systems and different types of radar transceivers of leading companies world wide (Furuno, JRC, Racal Decca, Raytheon, Norcontrol, Terma and the others).

• jam resistant, constant false-alarm rate (CFAR) video signal processing basing on the state-of-the-art algorithm.

• selection of a pin-point targets against the background of a cluster from a coastline or port facilities.

• reduction of the background and artificial interference effects on radar image by implementing of scan-to-scan and sweep-to-sweep correlation algorithms.

• selection of radar targets and their coordinate measuring.

• formation of a radar image with a size up to 2048 X 4096 pixels that is transferred to a dKart electronic cartographic system.

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