This is because it is unlikely that the two heading values will be exactly the same. If both were selected for heading, the SURVEY program would switch between gyro and GPS orientation as each device updates and you would see the vessel in your SURVEY Map window twitch at each update. BEWARE! If you are using a gyro for heading, you should not select heading for your GPS. Heading tells the SURVEY program to use the Course Made Good from the VTG, RMC or HDT message for the orientation of the vessel. However, it is used in conjunction with the Record Tide as Depth option to, for example, record waterfront depths recorded using land vehicles. Depth is typically unused by GPS devices. Version Number: Device Name: GPS with NMEA 0183 output DEVICE SETUP Position stores position data from this device. If you are using a DGPS, apply tide corrections from a tide gauge or in post-processing using tide correction files. GPS.dll can also calculate real-time tide corrections using data from RTK GPS devices.
The GPS device drivers can time-tag data from either RTK or Differential GPS devices. The time- tagging routine obtains accuracy to within 100 microseconds. These drivers include the Veritime time-tagging, accurate to within 1 millisecond and eliminates computer clock drift.
Sonarwiz.dll ħ Positioning Devices Last Updated 12/11 1-1ĩ GPS.dll GPS.DLL We recommend using the GPS device driver for your GPS device. NMEA.dll Last Updated 12/11 5Ħ Table of Contents XIX. SwingInd.dll DRIVERS WITH OTHER FUNCTIONS 171 I. ADCP.dllĥ Table of Contents DREDGEPACK DRIVERS 149 I. TideFile2.dll ENVIRONMENTAL SENSORS 145 I. Nautronix.dll XXIV.OdomCV_3.dll MOTION SENSORS 125 I. Inn455.dll Last Updated 12/11 3Ĥ Table of Contents XIX. Support:ģ Table of Contents POSITIONING DEVICES 1 I. 1 HYPACK Driver Interface Documents 56 Bradley St Phone: 860/ Middletown, CT Fax: 860/ USA Tech.