Product specifications

Chapter 1: Overview 1-9

Heading and Position

Data

Heading and Position

Data

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

hsb

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

qualityof yourheading sensor. It is importantthat boththe headingsensor 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.

Agyrocompassprovidesthebestperformanceinallconditions.Alternatively

you could use a fluxgate compass with rate gyro stabilization.

MARPA requires heading data to be frequently updated (we recommend a

dataoutput rateof greaterthan 8 Hz);heading datamust thereforebe provided

to the display on NMEA.

In multiple-display systems, heading must be connected, via NMEA, to each

display that will be used for MARPA.

We recommend the Pathfinder Smart Heading System (which includes the

Gyro Plus 2 unit). 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 conditionsa 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.