Chapter 4: Setup and Calibration 334. When your vessel reaches the start point for the first calibration run,press SPEED to start the run. The display indicates that the run is inprogress.5. When you reach the end point of the run, press SPEED again tostop the measurement.The display returns to the Auto Speed Cal page.6. If you wish to continue calibration with the next run, press DEPTH toincrease the run number by one. If you were not happy with the run,you can leave the run number the same and repeat the current runnow, or continue now and repeat the run later.7. Repeat steps 4 to 6 until you have completed all the runs. If all fourruns have been completed, when you press DEPTH the run numberreturns to 1: if any of the runs were incorrect, you can use theDEPTH key to select the required run number and then repeat therun if required.8. Press NAV to exit. The Exit Speed Setup page is displayed.9. Press SPEED to store the new calibration factor. Alternatively, pressNAV to cancel all changes.The last-used Setup page is displayed. Press NAV and ÙÙÙÙÙ togetherto return to normal operation.Manual CalibrationIf you already know the correct calibration factor, or have calculated ityourself by timing a known distance run, you should adjust theRayData’s calibration value as follows:1. If one of the Setup pages is not currently displayed, press NAV andÙÙÙÙÙ together to display the first Setup page.2. Press SPEED. The Auto Speed Cal page is displayed (see above).3. Press NAV to exit. The Exit Speed Setup page is displayed.4. Press DEPTH to display the Manual Speed Cal page.D3044-1