Chapter 1: Overview

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Heading and Position Data

Full functionality of the radar/chartplotter is achieved when it is part of an integrated system with other equipment (in addition to another hsb2 unit) connected via SeaTalk or NMEA 0183. Data from this equipment including position and heading is shown on the display and is used in calculations.

Details on connecting other equipment are given in Chapter 8.

Providing Heading Data for Radar/Chart Overlay and MARPA

The performance of MARPA and Radar/Chart Overlay is dependent on the quality of your heading sensor. It is important that both the heading sensor and the radar scanner (bearing alignment) are correctly calibrated. Refer to the appropriate heading sensor and radar scanner handbooks for calibration details. The better the accuracy of your heading data, the better the performance of MARPA and Radar/Chart Overlay.

A gyro compass provides the best performance in all conditions. Alternatively you could use a fluxgate compass with rate gyro stabilization.

MARPA requires heading data to be frequently updated (we recommend a data output rate of greater than 8 Hz); heading data must therefore be provided on NMEA.

In multiple-display systems, heading must be connected, via NMEA, to each display that will be used for MARPA.

We recommend the Raymarine Rate Gyro Compass system. Good results are also obtained with a Raymarine autopilot system incorporating a 150G or 400G Course Computer with internal rate gyro.

Other heading sensors connected on NMEA may provide satisfactory results in reasonable sea states. However, in unsettled conditions a rate gyro compass is advisable.

Contact Raymarine Customer Services or your authorized Raymarine dealer for additional information. For specific configuration details with the Raymarine course computer refer to Appendix E. If you are using a suitable third party heading sensor, refer to its documentation for installation and calibration details.

Heading and Position Data

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Raymarine Raychart Chartplotter RC530 PLUS, RL80CRC PLUS, Chartplotter RL70CRC PLUS manual Heading and Position Data