Tracor Instruments and Micro Navigation Systems have worked together to interface the Petrel Model 100 Compass with the Tracor Transtar and Satellite Navigator II.

On the average, the Tracor Satellite Navigators with multipass discrimination receive a good satellite fix every 30-90 minutes, depending upon latitude and the number of operational satellites. Between fixes, the satellite navigator dead reckons on the basis of speed and heading inputs. Using the Petrel Model 100, the heading input is accomplished automatically, directly from compass to SatNav. Automatic heading input enhances the accuracy of the SatNav DR position.

For free literature on the Petrel Model 100 compass, Write 16 on Reader Service Card