GPS-NAVIGATOR GP-32 & GP-37

7. OTHER FUNCTIONS7.10 GPS SetupThe GPS SETUP menu smoothes positionand course, averages speed, applies positionoffset, and deactivates unhealthy satellites.1. Press the [MENU] key once or twice toopen the menu.2. Choose GPS SETUP and then press the[ENT] key.SMOOTH S/C (Smoothing speed/course)During position fixing, ship’s velocity (speedand course) is directly measured by receivingGPS satellite signals. The raw velocity datamay changes randomly depending onreceiving conditions and other factors. Youcan reduce this random variation byincreasing the smoothing. Like with latitudeand longitude smoothing, the higher thespeed and course smoothing the moresmoothed the raw data. If the setting is toohigh, however, the response to speed andcourse change slows. The setting range isfrom 0 (no smoothing) to 9999 seconds.AVR. SPEED (Speed averaging)GPS SETUP menu3. Choose item and then press the [ENT]key.4. Change setting with the cursor pad andthen press the [ENT] key.5. Press the [MENU] key twice to finish.GPS SETUP menu descriptionSMOOTH POS (Smoothing position)When the DOP (Dilution of Precision, theindex for position-fixing accuracy) or receivingcondition is unfavorable, the GPS fix maychange greatly, even if the vessel is dead inwater. This change can be reduced bysmoothing the raw GPS fixes. The settingrange is from 0 (no smoothing) to 999seconds. The higher the setting the moresmoothed the raw data, however too high asetting slows response time to change inlatitude and longitude. This is especiallynoticeable at high ship’s speeds. “0” is thenormal setting; increase the setting if theGPS fix changes greatly.Calculation of ETA and TTG, etc. is based onaverage ship's speed over a given period. Ifthe period is too long or too short, calculationerror will result. Change this setting ifcalculation error occurs. The default setting is60 seconds. The setting range is from 0 (noaveraging) to 9999 seconds.LAT/LON OFFSET (L/L position offset)You may apply an offset to latitude andlongitude position generated by the GPSreceiver, to increase position accuracy.DISABLE SVEvery GPS satellite is broadcasting abnormalsatellite number(s) in its Almanac, whichcontains general orbital data about all GPSsatellites. Using this information, the GPSreceiver automatically eliminates anymalfunctioning satellite from the GPS satelliteschedule. However, the Almanac sometimesmay not contain this information. You candisable an inoperative satellite manually.Enter satellite number in two digits and thenpress the [ENT] key. To restore a satelliteenter “00”.40