Preparing GPS/GNSS receivers and hardware for GPS Week Number Rollover (WNRO) on April 6, 2019 (2023)

At 23:59:42 UTC on 04/06/2019 (midnight GPS time moving around 18leap secondsfrom UTC), the 10-bit GPS week number sent by the constellation, was reset to zero for the second time since GPS began on 1/6/1980.The official presentation on this topic from describes the problem,and theThe US Department of Homeland Security has issued a bulletin regarding the use of GPS for timing purposes. The journal Nature has published an article detailing the impact of the tipping on the global scientific community.GPS interference threatens thousands of scientific instrumentswho cited UNAVCO. The purpose of this article in the UNAVCO knowledge base is to educate operators of high-precision GPS receivers on what to do. Below is also information on some seismic and cellular devices.

As stated in the presentation, the best course of action for all owners of GPS receivers and other hardware that uses GPS for timing or geolocation is to "trust but verify" by contacting the manufacturer of such hardware directly to get advice. In addition to the high-precision receivers described in this article, devices such as seismometers, data loggers, cellular modems, Internet routers, etc. they may also require firmware upgrades or hardware replacement to properly handle the transfer.

(Video) WNRO 6 April 2019 and Trimble products

Now that the transfer is complete, the new details are in the appropriate sections below.Not all of the systems used by the UNAVCO community worked as expected during the handover. In most cases, systems that were expected to fail had no problems (old Trimble and Topcon hardware), while others that were expected to handle handover correctly did not, particularly Javad receivers with old firmware on certain settings. The overall impact on UNAVCO's operations was minimal and likely unnoticed by the vast majority of our users. Some stations were preemptively removed from the data stream and archive for two days while their performance was evaluated, but then returned to normal operation.

There wasmany reports of WNRO induced failuresin systems around the world, includingNew York City Wireless Communications Network,Honeywell Avionics, which grounded some Boeing 787 and 777 aircraft,Australian weather balloons, YNOAA-water buoys. But as in the case of Y2K, the WRNO had a minimal effect, as in "The Tech Disaster That Didn't Happen".

It is very possible that the effects of the transfer of 04/07/2019 were not noticeable immediately, but will take effect at random times in the futureif inappropriate methods are used to configure the GPS data in the firmware. The main symptom of a device not handling rollover correctly would be that all data recorded or transmitted would have a timestamp of 19.7 or 39.4 years in the past, i. h instead of 4/7/2019, you would use 6/1/1980 or 8/22/1999. Simulation tests by UNAVCO and many others showed that satellite tracking, position fixes, and other functions would continue, so the devices would not fail, but any system that relied on the timestamps generated by these devices could. . And while all data files with incorrect timestamps POSSIBLY can be recovered using post-processing translation software, this has yet to be confirmed. The best course of action is to ensure that the firmware is up to date for any devices that require it and have updates available, or to replace hardware that cannot be updated. Also make sure that any software systems using suspect hardware realtime streams can handle incorrect timestamps.CRITICAL SYSTEMS MUST BE ACTIVELY MONITORED DURING AND AFTER THE DUMP TO ENSURE CONTINUED OPERATION.

(Video) unavco: неправильное поведение Topcon GB-1000 GNSS при симуляции Rollover GPS

here is aUNAVCO simulator 1 minute test videoDemonstration of incorrect behavior of a Topcon GB-1000 GNSS receiver with an older firmware version during transfer. Note that the receiver displays UTC, which differs from GPS time by 18 seconds. Topcon has released a new firmware for this receiver to handle rollover correctly; see below for more details.

Below is a list of resources available from the major manufacturers of high-precision GPS hardware, detailing their concerns. This is by no means complete, as there are many others that can be affected. If in doubt, visit your manufacturers' websites directly and/or contact support by phone or email for detailed advice. Each manufacturer recommends making sure that each device has the latest available firmware installed.


(Video) The GPS Rollover – What You Need to Know

  1. Trimble NetRS receivers need to be updated to firmware version 1.3-2. This version can be applied to all NetRS receivers regardless of warranty date.
    1. POST-ROLLOVER UPDATE: All NetRS receivers, regardless of firmware version, successfully processed WNRO and UNAVCO performed post WNRO cold start testing to confirm correct operation. However, there is no guarantee that older firmware won't fail at some point in the future, so all receivers should still be updated to 1.3-2 if possible.
  2. Topcon GB-1000 receivers need to be updated to firmware version 3.5p5, a new version of Topcon. UNAVCO tested this version with a simulator and found that although the receiver board correctly handles rollover, the front LCD displays an incorrect date of 19.7 years ago. This can be safely ignored and is because the dialer uses a separate firmware file that has not been updated yet. Based on UNAVCO simulator test results, data recorded after transfer of receivers with older firmware CANNOT be used.
    1. POST-ROLLOVER UPDATE: GB-1000 receivers with firmware version 3.4p2 continued to function correctly even after the WNRO. As with NetRS receivers, there is no guarantee that proper operation will continue indefinitely, so upgrading to 3.5p5 is strongly recommended.
  3. Topcon Net-G3A receivers require upgrades to 4.7p6 or 4.7p10 depending on the data format used.
  4. Legacy Trimble 5700 Model 1, 5800 Model 1, and R8 Model 1 receivers require updates to firmware version 2.32, for which it may be necessary to obtain warranty codes from Trimble Support.
    1. POST-ROLLOVER UPDATE: All previous receivers correctly handled the WRNO in firmware version 2.30. As mentioned above, receivers need to be updated to 2.32 regardless of current capacity. TOTrimble 4000SSI at UNAVCO HQ still working fine after WNRO. It's just not the original Trimble 4000sx.
  5. Firmware updates have not been available for older Ashtech micro-Z and Z-12 receivers for many years. Tests of the simulator at JPL show that while these receivers should continue to function during handover, the streams produced by the receivers have an incorrect timestamp, but can be exploited using the correct "-week" flag when translating with teqc. (For example, for all data logged for the week beginning April 7, use "-week 2048". The logged data files for these receivers could not be tested, although they are likely based on the se can be used in the same way as confirmed so far.
    1. POST-ROLLOVER UPDATE: Data files logged from Micro-Z and Z-12 receivers in the field are correctly handled as expected by including the correct "-week" flag when translated with tecq. Seethis thread in the teqc user forum about this topic, including proper handling of .nav files.
  6. Some Leica Geosystems receivers may require some action. See below for more information.

Here you will find direct links, details and overviews of the products of the most important hardware manufacturers:

  1. ashtech.
    1. As mentioned above, the older generation of Ashtech receivers require special translation steps to use the data collected after transfer. The best option is to replace them with newer hardware whenever possible.
    2. Newer Ashtech receivers, such as the ProMark 500, which was produced after Magellan and later Trimble (now known as the "Spectra" brand) acquired the Ashtech brand,are described in this Trimble Service Bulletin. Here is an additional page on these products with links to firmware downloads.IN SOME CASES ACTION MAY BE NECESSARY.
  2. Javad.
    1. Senior Firmware Architect at Javad has indicated that all of their systems (with one exception noted below) have been tested and will function correctly during the move, therefore no action is required. For specific questions, please contact Javad Support through the usual channels.
    2. Operators of JavadSigma receivers should note the following: A firmware update does not appear to be necessary, but should be done if possible. These receivers should be closely monitored during and after rollover: “We tested firmware versions 3.3.4 and 3.4.0 by simulator, unfortunately these firmwares showed the problem with rollover for the week, the receivers closed the GPS satellites from the calculation position from the beginning of the week and until new ephemeris are collected with a new week number (30-60 seconds). Modern firmware versions (we tested 3.7.4 and 3.7.6beta) passed this test successfully."
    3. POST-ROLLOVER UPDATE: Many Javad receivers with older firmware experienced problems, either recording or transmitting BINEX or tracking Galileo satellites. The best solution is to update all javad receivers to thelatest firmware versions available on their website. If this is not possible, disabling BINEX logging/streaming in favor of .jps or RTCM formats and/or disabling Galileo tracking will restore proper operation.Javad has also updated its JPS2RIN translation softwarecorrect incorrect generation of navigation files according to the WNRO; All users who generate RINEX3 with this utility need to upgrade to the new version.
  3. Leica Geosistemas gave the following advice.IN SOME CASES ACTION MAY BE NECESSARY.
    1. On April 6, 2019, the GPS week number transmitted in the navigation message will change from 1023 to 0 ( This will be the second reset of the era since GPS time was introduced.

      In preparation for this event, the Leica Geosystems reference station and monitoring teams tested all of their GR/GM/GMX series receivers by simulating a weekly rollover. We found that all receivers continue to function normally during and after the handoff. The week number continues to increase. The following table summarizes the recommended and minimum receiver and measurement module (ME) firmware versions required for continuous operation. You must ensure that all receivers older than April 6, 2019 are running at least the minimum ME/receiver firmware.

      (Video) Guy Buesnel - Trust but Verify - When GPS can go wrong

      recipient type

      Recommended receiver/ME firmware

      GR30/50 and GM30

      RefWorx 4.30.63 / 7.402

      GR10/25 y GM10

      RefWorx 4.30.63 / 6.525

      GRX1200+ y GRX1200+GNSS

      SmartWorx 9.20 / 6.405

      GRX1200 GG Pro

      SmartWorx 9.20 / 3.823

      GRX1200 Lite/Classic/Pro

      SmartWorx 9.20 / 2.127


      . / 7.403


      . / 6.406

      GMX902 GG/GNSS (ME4)

      . / 6.423

      GMX902GG (ME3)

      . / 3.823


      . / 2.127


      . / 942

      Important note

      We always recommend updating receivers to the latest version of RefWorx, SmartWorx y YOfirmware versionSto ensure continuous operation.Previous firmware versionsthat the minimum ME/receiver firmware listed in the table above has not been tested for GPS era week rollover.

  4. NovAtel.
    1. You can find detailed information about NovAtel systems in yourrollover page
  5. Nordic.
    1. Septentrio has indicated that its modern receivers, such as the PolaRx4 and PolaRx5 series, will work correctly with any firmware version, as will OEM boards, such as AsteRxM and M2, used in Xeos Resolute receivers. SeeSeptentrio rollover information page,as well asFor details on other devices, see this Service Bulletin.
  6. Topcon Positioning Systems.
    1. As mentioned aboveMANY WIDELY USED TOPCON RECEIVERS REQUIRE ACTION.All Topcon users should consultTopcon Rollover Information Page, which contains all available information and links to relevant downloads. Please note that access to many of the linked areas may require free registration.
    1. Newer CORS-class Networked Trimble Reference Station Receivers, including Alloy, NetR9, and NetR8, should work with all but the oldest firmware versions. UNAVCO confirmed that previous versions of NetR9 FW worked as expected in simulated rollover tests.Only the NetRS, as described above,requires an update to firmware version 1.3-2.For more information on specific models and Trimble Pivot Platform, GPSNet, and RTKNet software, see this Trimble Service Bulletin.
    2. Some older Trimble serial port style receivers, such as5700 Model 1, 5800 Model 1 and R8 Model 1 require updates to firmware version 2.32as described above. A copy of firmware version 2.32 is provided below.Other similar models should work regardless of firmware version.See this service bulletin for details on this class of Trimble receivers.
    3. Trimble Spectra brand receiver described in the Ashtech section aboveare described in this Service Bulletin.
    4. Additional information aboutReceptor TrimbleThey're availablein:

Users of real-time GNSS software are advised to ensure that their systems are up to date.BKG NTRIP (BNC) client has been updatedto correctly handle the rollover.

Seismic and other equipment operators are strongly encouraged to contact their manufacturers for details on how to prepare for a rollover. The IRIS PASSCAL Instrument Center has aNewsletter about your seismic equipment. GFZ Potsdam published oneAdvice on your suite of geophysical instruments. Here are reports ofGüralp about their systems,Nanometrics regarding its data loggers,Kinemetry relative to the Q-330 series, YSierra Wireless regarding its routers and gateways.

I will continually update this article with new information and useful links as I receive them. Please check back often or contact support if there are specific questions that your manufacturers or web searches cannot answer.


What is the rollover period for GPS? ›

The GPS week number rollover is a phenomenon that happens every 1,024 weeks, which is about 19.6 years. The Global Positioning System (GPS) broadcasts a date, including a week number counter that is stored in only ten binary digits, whose range is therefore 0–1,023.

What is the difference between GPS and GNSS receiver? ›

GNSS and GPS work together, but the main difference between GPS and GNSS is that GNSS-compatible equipment can use navigational satellites from other networks beyond the GPS system, and more satellites means increased receiver accuracy and reliability.

What is difference between GNSS and GPS? ›

GPS is traditionally refers to the North American global positioning system, or satellite positioning system. GNSS is a term that refers to the International Multi-Constellation Satellite System. So GNSS typically includes GPS, GLONASS, Baidu, Galileo, and any other constellation system.

What is the format of GNSS receiver data? ›

The format for operational GNSS data files is Receiver Independent Exchange (RINEX) format, version 2 (2.10 or 2.11).

How long do you have to complete a rollover? ›

There are many requirements to make a valid rollover contribution including the 60-day requirement. Assuming other requirements are satisfied, you have 60 days from the date you receive a distribution from an IRA or retirement plan to roll it over to another plan or IRA.

What is the rollover rule? ›

A rollover occurs when you withdraw cash or other assets from one eligible retirement plan and contribute all or part of it, within 60 days, to another eligible retirement plan.

How do I set up a GNSS receiver? ›

See To configure a rover dial‑in data link. Tap and select Settings / Connections / Bluetooth. In the Connect to GNSS rover field, select the receiver. Pair with the device.
At the rover:
  1. Mount the receiver onto a range pole. ...
  2. Attach the controller to the holder.
  3. Connect the controller holder to the range pole.

What is the best GNSS system? ›

1. Comnav N5 – Best Overall. ComNav Technology is a China based Original Equipment Manufacturer (OEM) that develops and manufactures RTK GNSS receivers, GNSS OEM boards and solutions for high-precision positioning applications worldwide.

What is the most accurate GNSS system? ›

Despite being the first GNSS system, GPS is still the most accurate navigation system worldwide today. The newest GPS satellites use rubidium clocks and are synchronized to ground-based cesium clocks for even further accuracy.

Do phones use GPS or GNSS? ›

To calculate your position, the chip depends on data provided by GNSS constellations, such as GPS, Galileo and Glonass. Most of the chips in smartphones today are multi-GNSS, meaning they use data from more than one GNSS constellation.

How many satellites are needed for GNSS? ›

A GNSS receiver needs a minimum of 4 satellites to be able to calculate its own position. Three satellites will determine latitude, longitude, and height. The fourth one synchronizes the receiver's internal clock.

What are the 3 segments of the GPS GNSS system? ›

This system consists of three segments: the space segment, the control segment, and the user segment.

What are the two components of a GNSS receiver? ›


The GNSS consist of three main satellite technologies: GPS, Glonass and Galileo. Each of them consists mainly of three segments: (a) space segment, (b) control segment and (c) user segment.

How do I calibrate my GNSS receiver? ›

Calibration steps. Open the aluminum covers of base point, set up the antenna of GNSS on the forced-centering base on pillars, rotate the direction mark on antenna to the north and fix it. Check the ends of signal cable are plugged in the antenna and IUC receiver exactly. Turn on the power of IUC.

Which is a standard format for GPS data? ›

Today in the world of GPS, NMEA is a standard data format supported by all GPS manufacturers, much like ASCII is the standard for digital computer characters in the computer world. The purpose of NMEA is to give equipment users the ability to mix and match hardware and software.

How strict is the 60 day rollover rule? ›

If you fail to meet the 60-day window, you could suffer a few consequences: You may owe taxes and penalties. If you break the 60-day rule on accounts with pre-tax income such as a traditional 401(k) or traditional IRA, the IRS will factor that as income for this tax year.

What are exceptions to the 60 day IRA rollover rule? ›

The only exception exists with a Roth IRA. A 60-day rollover Roth IRA is free from taxes because the funds deposited into a Roth IRA are already post-tax funds. However, though Roth IRA withdrawals will be free from taxes, they are not free from penalties if the distribution is not a qualified distribution.

How do I complete a rollover? ›

Overview: How to start your 401(k) rollover
  1. Decide what kind of account you want. ...
  2. Decide where you want the money to go. ...
  3. Open your account and find out how to conduct a rollover. ...
  4. Begin the rollover process. ...
  5. Act quickly. ...
  6. Keep your 401(k) with your previous employer. ...
  7. Roll over your 401(k) to an IRA.
4 days ago

What two things are most important in preventing a rollover? ›

The following two things will help prevent rollovers.

Keep the cargo close to the front and drive slowly around turns. Keep the cargo as close to the ground as possible and drive slowly around turns.

What are two types of rollovers? ›

There are also two different ways of handling the actual mechanics of the rollover:
  • Direct rollover. Your funds are transferred directly from your old account to your new account.
  • Indirect rollover. You receive a check from an old retirement account and deposit it into the new account.

How do you calculate rollover requirements? ›

It's just 1x the deposit amount. So if you're betting $20 a game, you need to make five bets before you're eligible to cash out. But with a 10x rollover, you need to wager $1,000 before you can cash out.

Do GPS receivers need Internet? ›

GPS navigation usually works independently from needing a data connection. Although some apps require a data connection to allow their GPS functionality to work, there are GPS tracking apps that offer a robust offline navigation experience without that connection.

How do I connect my GPS receiver? ›

Connect mock location app to Bluetooth GPS
  1. Tap the "Bluetooth GNSS" app.
  2. Tap the settings "gear" icon in the top-right corner.
  3. Tap "Select" and choose the paired Bluetooth GPS receiver, then tap "Save"
  4. Use the Android "back" button to go back to the main screen of the Bluetooth GNSS app.
Mar 2, 2022

What are required for a GPS receiver to work? ›

As we noted above, the GPS receiver needs 4 satellites to work out your position in 3-dimensions. If only 3 satellites are available, the GPS receiver can get an approximate position by making the assumption that you are at mean sea level. If you really are at mean sea level, the position will be reasonably accurate.

What are the top 5 GNSS? ›

The Global Positioning System (GPS) GPS is a GNSS constellation, but GNSS is not always GPS. GPS is one of the 5 GNSS constellations used around the world. The 5 GNSS constellations include GPS (US), QZSS (Japan), BEIDOU (China), GALILEO (EU), and GLONASS (Russia).

What is better than GPS? ›

A new hybrid optical-wireless network has been developed for navigation that is far more robust and accurate than GPS, especially in urban settings. Researchers have developed an alternative positioning system that is more robust and accurate than GPS, especially in urban settings.

What is GNSS on my phone? ›

The last several versions of Android have turned it into a powerhouse for processing Global Navigation Satellite System (GNSS) data from systems such as Global Positioning System (GPS) and Galileo.

What are the problems with GNSS? ›

The problem with GNSS – jamming, spoofing and incorrect data

The trouble with GNSS is that the signals are extremely weak, meaning they are very susceptible to interference, and can be blocked altogether through the use of inexpensive jamming technology.

What is the difference between GPS and a GPS? ›

GPS uses the network of satellites to get your location, while A-GPS (Assisted GPS) uses the network of satellites along with information from the cell towers of your mobile operator to pinpoint your location. This added dimension makes A-GPS faster and more accurate.

What are the hazards of having GNSS? ›

Solar Effect, Radio Frequency Interference, and On-board systems are examples of Unintentional GNSS interference sources. However, the Intentional sources such as jamming and spoofing are considered serious threats to the continued safety of air transport.

Does GPS work without phone signal? ›

Yes, GPS works because it is completely independent of any WiFi or Cellular data connection. A GPS is just a radio that receives location data from satellites, so its radio is separate from any WiFi, Cellular, or Bluetooth radio. Pre-loaded maps need no internet connection to work.

Do all cell phones have GPS tracking? ›

Smart Android and iOS phones are built with technologies, i.e., GPS, that allows a phone's location to be accessible. An app like Find My Friends uses GPS to keep track of multiple people at the same time.

Does GPS track phone or SIM card? ›

With GPS navigation systems, GPS location info is displayed on the same device on it was recorded. In other words, no need for a SIM card. Satellite trackers such as Spot use GPS to determine location, but then send that data over the Globalstar satellite network rather than cellular networks.

What does GNSS stand for? ›

Global navigation satellite system (GNSS) is a general term describing any satellite constellation that provides positioning, navigation, and timing (PNT) services on a global or regional basis.

What is GNSS used for? ›

Global Navigation Satellite System (GNSS) refers to a constellation of satellites providing signals from space that transmit positioning and timing data to GNSS receivers. The receivers then use this data to determine location. By definition, GNSS provides global coverage.

How do GNSS receivers determine your location? ›

There are satellites out there in space, and each of them has its own orbit. Every satellite transmits the signal which includes its exact position at a particular moment of time. The receiver accepts this data and uses it to determine its position.

How GPS works step by step? ›

GPS is a system of 30+ navigation satellites circling Earth. We know where they are because they constantly send out signals. A GPS receiver in your phone listens for these signals. Once the receiver calculates its distance from four or more GPS satellites, it can figure out where you are.

What are the 3 measurements of GPS that are utilized by surveyors? ›

The information collected from these satellites then calculates the latitude, longitude and height of the receiver. If the receiver is moving, continuous data collection can be used to calculate the changing position of the receiver over time, which can be used to calculate speed.

What are the different types of GNSS receivers? ›

The types of GPS and GNSS receivers vary, but include GPS and GNSS attitude and positioning receivers, heading receivers, DGPS (differential GPS) receivers, GIS receivers and data collection and mapping receivers, smart antennas, survey receivers, and of course, OEM receiver boards and receiver modules.

How long is GPS data stored? ›

Here's How Long Your Wireless Carrier Holds on to Your Location Data. AT&T keeps cell-site location information for up to five years; Verizon drops it after one. The Federal Communications Commission has shared some significant digits: How many years wireless carriers keep location data about their customers.

What does rollover period mean? ›

What is Rollover? A rollover means carrying forward your future positions from closing your positions near the expiry date to opening the same new position in a further-out month contract. In simpler words, the process of carrying forward your position from one month to another month is called a rollover.

How long should a GPS last? ›

For some wired GPS locators, the locator continues to be used as long as it is well maintained and installed correctly. If you want to use 5-6 years, there is really no problem. Some of the more sophisticated manufacturers may work harder on power protection to use better and more durable chips.

How often does GPS need to be updated? ›

They tend to stay put. But things do change slowly over time. Roads get rerouted or changed for safety, streets get renamed, bridges get replaced, traffic patterns are modified. So, if you use the navigation system often, and drive a lot in unfamiliar places, then it's probably worth updating every four or five years.

Can your cell phone provider track your phone? ›

The answer is yes, it's possible to track mobile phones even if location services are turned off. Turning off the location service on your phone can help conceal your location. This is important if you don't want third parties knowing where you are or being able to track your movement.

How do I retrieve my GPS data? ›

Import GPS Data
  1. Open Google Earth.
  2. Turn off the GPS device and connect it to your computer.
  3. Turn on the GPS device.
  4. Click Tools. GPS. The "GPS Import" window opens.
  5. Choose how you want the data displayed.
  6. Click Import.

Can you still use your GPS without data? ›

Yes, GPS works because it is completely independent of any WiFi or Cellular data connection. A GPS is just a radio that receives location data from satellites, so its radio is separate from any WiFi, Cellular, or Bluetooth radio. Pre-loaded maps need no internet connection to work.

What is the 12 month rollover rule? ›

One Rollover a Year for an IRA owner

The rule says that an IRA owner cannot roll over an IRA distribution that was received within 12 months of a prior IRA distribution that was rolled over. Traditional and Roth IRAs are combined for purposes of the once-per-year rule.

What happens if you dont rollover? ›

However, if you fail to move the money into a qualified retirement plan within 60 days, it is taxed as ordinary income, plus a 10% penalty if you're under age 59½, which means you could end up paying significantly more than 20%, depending on your federal and state income tax rates.

How long would GPS last without maintenance? ›

GPS satellites orbit at 12,600 mi, so they'll be up there a long time, barring collisions with debris. The newest spacecraft have a design life of 12 years, but that's a minimum. Spacecraft such as Pioneer 6 and Voyager 1 have continued to operate for 35+ years.

Will leaving GPS drain battery? ›

Their concern isn't wholly unfounded. It has been shown that GPS and geofencing apps do consume battery power throughout the day. In a recent study, a GPS app depleted battery life by 13% in an area with good signal strength and 38% in an area with weak signal strength.

Do GPS ever lose signal? ›

However, GPS receivers are likely to lose satellite signals due to various unpredictable factors. The prevalence of GPS signal loss (GSL) on PMUs are first investigated using real PMU data. The historical GSL events are extracted from a phasor data concentrator (PDC) and FNET/GridEye server.

How much does it cost to update your car GPS? ›

Instead, updates must be purchased at a cost of $129 to $299, either through the automaker, dealership, or online. Plus, there can be an extra charge for installation. For that much money, you could buy a very nice portable GPS unit with lifetime map and traffic updates.

Who is responsible for updating GPS? ›

Some map makers, such as Google, use the National Address Database to update the address data found in navigation devices, apps, and online maps.

How do you update a GPS system? ›

  1. Step 1: Connect your device to your computer. Before beginning the update, connect your Garmin GPS device to a computer. ...
  2. Step 2: Install Garmin Express. ...
  3. Step 3: Access or purchase updates. ...
  4. Step 4: Disconnect your device.
Oct 2, 2020

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