NAVi GT-31 - Now available from Groundswell
Download PDF HERE SOON........
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NAVi GT - 11 info here..........GT - 11 ONLY ........NOT GT 31
- Checklist when you get the unit:-
ONLY FOR GT-11 -----(Below info is for software version 1.5 & below) GT 11 only
1. When you get the NAVI put the car charger and a spare USB cable into the car so you can charge the unit on the beach if you run out of power.
2. From the Settings screen set the Language to your preferred language .
3. Set your local timezone.(Wellington for New Zealand)
4. Set the units to meters (for Kilometers), Feet (for Miles) or NM (nautical miles).
5. Set the Power Mode to Normal. The low power mode might cause problems so best not to play around with it while sailing.
6.Set DGPS source to Off. The SBAS setting has not been tested on the NAVI so best not to set to SBAS until it is tested and proven to be better.
7. Set your User Name.
8. Check the Firmware version is up to date.
9. From the Track screen check that the track interval is set to 1 second. Select Interval and select 1 second. There is no 2 second option and the NAVI is accurate enough for 1 second and has oodles of space.
10. From the Memory Card screen check that tracks will be recorded to SD card. Ensure you have the SD card in the unit and the log switch is on by clicking Log Switch and click On.
11. Check that all the NMEA sentences are being saved to the SD card by selecting NMEA Items. Ensure that all are selected. Some we dont use yet but it may come in handy later.
12. Check that the file size is set to Card Size. This avoids multiple files being created for the one session.
13. Format the card to be sure the format is compatible with the NAVI. Again this is done from the Memory Card screen.
- Checklist before going sailing:
(Below info is for software version 1.5 & below)
1 . Check that it is fully charged. Plug it into your cigarette lighter in the car or your laptop using the USB cable, because it can charge directly from the USB cable.
2 . Check that you have the SD card installed correctly. Turn on the unit. After a few seconds it should briefly display Card Found then New File. If it does not do this then something is wrong.
3 . Check that the light is off. It is possible to set it on and stay on which is not good! Press the on/off button briefly to turn the light on or off.
4 . Clear the onboard flash ram. The NAVI can save tracks to both flash ram and the SD card so best to record both just in case. Use the Track screen, select Clear, and Yes to confirm.
5 . From the Trip screen clear the trip data and displayed max and average speed. Toggle down to Trip Max Speed and hit the toggle and then Yes to reset the data.
6 . Do not turn the NAVI off and on during the sailing session as this will create multiple files that will need to be stitched together. Best to simply leave it on.- Download Checklist
After you have broken the world speed record and ready to load the data onto your computer, remove the SD card and place it into your computer's card reader. All software will be able to read the file directly from the SD card. But my preferred method will also save the file to the hard disk as follows:
FOR PC
1 . Start by creating a folder on your hard drive where you want to save all your NAVI data. You might save it by year or month. Its up to you.
2 . Open RealSpeed or GPS-Results and select File Open... to navigate to the SD card. Enlarge the File Open dialog box and in the top right corner you can choose Show Details so you can see the date and size of each file.
3 . The files are named after the date and time they are created. The files created are about one megabyte per hour of sailing. So RIGHT click the largest file with the right date and select copy. Navigate to your NAVI folder and right click and select Paste to paste the file into your NAVI folder. By doing the copy and paste from the File Open dialog box it save you navigating to the folders in two pieces of software.
4 . Click the new file again and if you wish click it again to rename it. Then select Open from the Open Dialog box.
- RealSpeed/GPS-Results will open the file and process the results. You can then select Save As... and the same NAVI folder is opened to save the track as a GPX file.
- To get the tracks off the flash ram is a bit more involved. NAVi comes with software to download the flash memory to an NMEA file on the computer. Connect the NAVI to the computer using a USB cable and set the NAVI into NAVIlink mode using the NAVILink screen. Run Navilink.exe, select the COM port and browse the target folder to your NAVI folder. Click the Read button to download the data. Once the file is downloaded then RealSpeed or GPS-Results can read the downloaded file.
For Mac OSX
- There is currently no way to download data directly from the unit.
The only method is to get the info of the memory (SD) card .
To get the data off the card I use GPSBabel+ software -

• The NAVi GT-31 is a compact, business card sized GPS unit, .
  
  -The NAVi GT-31 is a compact, business card sized GPS unit.
  - The Gt - 31 will ship with the latest firmware on board.
  The Gt- 31 is equiped with the new Speed Genie option, a purpose designed function for all speed freaks - kiters & windsurfers , with very user friendly interface.
  
  - GT31 is the enhancement version of GT11.
  Both its hardware and firmware has improved tremendously.
  SiRF SIII high sensitivity chipset is used in hardware side. You can put the GT31 in your packet or even backpack and still can get the position fix.
  The GT31 firmware keeps the user interface compatible with GT11 as much as possible. It also improves a lot in system performance. You do not need to learn how to us the new device again. BGT31 has all the functions of GT31 plus Bluetooth captbility of the GT31