1. Do you know how many satellites there are globally?
Currently there are 27 satellites around the globe.
2. How many satellites signals can be received?
Currently civilians can only receive up to 12 satellite signals.
3. Do you know how many satellites signal require to fix your current position?
3 satellite signals are required to establish the longitude and latitude of your current position. Four signals are required to calculate your altitude.
4. When was GPS made public to international civilians?
March 1995, by President Bill Clinton.
5. How many global navigation satellite systems are there currently?
There are two Global Navigation Satellite Systems currently in operation:
-The U.S. Global Positioning System (GPS) and the Russian global Navigation Satellite System (GLONASS). A third one name GALILEO is currently being developed in Europe. It is schedule to begin service in 2008.

1. What can I do about map errors?
Please report errors in the map directly to the map data provider at the below
http://mapreporter.navteq.com
2. I have poor or no satellite reception on my device. What can I do?
Depending on the type of vehicle and location you are in, sometimes the GPS signal cannot be easily detected. In this case, please use an external GPS antenna to strengthen signal acquisition.
3. How often are the maps updated and how can I update to the latest version?
New roads are being built daily. This information is collected and processed by the map data provider regularly. New releases of the map will be updated annually and be made available to you. Registered users will be the first to be notified of new maps. This will apply to our G2 and G4 models. GPS model NT-147 will NOT receive any map updates.
4. What is the difference between Cold, Warm and Hot starts?
Cold start is automatically performed when the satellite information stored in your device is missing or outdated. It is generally used when your device has been moved 3000miles or more since its last satellite detection.
- A warm start retains most settings and almanac information on your device. It only tries to collect a limited amount of information that is necessary for a satellite fix.
- A hot start is when all the required information is present and ready to be use. This expedites the satellite acquisition process. Most of the time, your device performs hot starts.
5. What do I do in case of a malfunction?
When the unit idles or becomes unresponsive, you may perform a soft reset by flipping the RESET button located at the back of the device to the OFF position for 10 seconds before switching back to ON. This will relaunch the entire program.
6. What is the warranty and return policy?
Your device is covered under warranty of 90 days parts and labor from the time of purchase. Please have your proof of purchase ready when processing a claim. Additional warranty can be purchased by contacting us at support@navtour.com
7. Are our units WAAS compatible?
WAAS stands for Wide Area Augmentation System. Its primary function is to enhance the availability of the GPS satellite positions. Though NT-147 is not WAAS compatible, it features an external antenna that boosts reliable and accurate satellite fixes.
8. Can we add additional POI to the data base?
The NT-147 is designed for simple and easy navigational use. Additional Points of Interest cannot be currently added. Please look at our other devices that offer this feature.
9. How do you add music and pictures to the NT-147?
Step 1. Save the audio or picture files on to a separate SD card.
Step 2. Power off the device
Step 3. Extract the existing SD card from the SD card slot located on the left side of the device.
Step 4. Insert the card with your saved audio or pictures files into the SD card slot.
Step 5. Power on the device
Step 6. The main navigation with 6 icons appears. Click on the appropriate option of your choice, music or photo viewer.

I plugged my unit to the computer in the USB port and there is no response, what could be wrong?
Make sure Microsoft Activesync is loaded on your computer.