Automatic translation from German. View original text

Offline flight navigation: which app works without a network

Updated August 21, 2026 · Tim Krauss

In short: Offline flight navigation is not a yes-no feature, but a list. Map, terrain, airfields, airspaces, navaids, reporting points, and traffic patterns can be pre-loaded onto the device and then continue to run without any connection. Weather, internet-based traffic, and NOTAMs (Notices to Airmen, i.e., official short-term messages), on the other hand, are live data that no one can preserve: you fly with the status from the last download.

The moment comes faster than you think. You turn into the Inn Valley near Kufstein, the valley narrows, the bars at the top of the screen decrease, and eventually they're gone. Or you fly out over the North Sea, or through one of the quiet corners of the Hunsrück, where mobile reception has always been a matter of luck. What happens on your iPad now is not decided at that moment. It was decided beforehand, on the ground, when you set up the app.

That's why "can the app go offline?" is the wrong question. The right one is: Which specific layers can it go offline, and which cannot?

EuroPilot Connect originated from the Sport- und Segelfliegerclub Bad Waldsee-Reute , based at EDMZ, 660 meters of grass, runway 14/32, not on the drawing board of a software company. Many in the team hold a pilot's license, and flights and tests are conducted on Bristell LSA, Comco Ikarus C42 C, and Robin DR400, i.e., across ultralight and Echo class. I built the app myself, so I'm not neutral. And because everyone claims everything when it comes to offline promises, here are numbers instead of adjectives: The device package contains 4,724 runways at 3,784 airfields from 60 countries, plus 1,321 traffic patterns, of which 1,133 in Germany alone, and 952 VFR reporting point routes. The base map is covers 25 European countries self-hosted. All of this goes onto the device. What this article gives you are test questions that you can run through on any app yourself.

Original view from EuroPilot Connect on iPad. Discover all 14 app views →

How do you recognize a true offline flight navigation app?

You can recognize an offline flight navigation app by three characteristics that you can check on the ground in a few minutes.

• A conscious selection before the flight. Can you specify what goes on the device? Without this selection, you won't know what's available in the cockpit.
• A visible download with progress and scope. If you don't see how much has been downloaded and which data layers are included, you cannot rely on it.
• A persistent state that survives an app restart. A temporary cache that is empty on the next start is not an offline inventory.

In addition, there is a fundamental limit that applies to every app, regardless of the manufacturer: weather, traffic, and NOTAMs are constantly being generated. No download in the world can store data that did not even exist at the time of the download. An app can only show you the status you last retrieved.

Which data is stored offline on the device, and which never is?

In EuroPilot Connect, you tap a country and download it as a package. What comes with it is fixed; what doesn't come with it is also fixed. Here is the breakdown without embellishment:

Two things fall outside this pattern, and both are worth a closer look.

GPS does not require a cellular network, but not every iPad has GPS. Positioning is purely reception of satellite signals and works even in airplane mode. The catch: Only iPads with a cellular module (the Cellular models) have a built-in GNSS receiver. A Wi-Fi-only iPad does not have one, and even with a full country package, it needs an external GPS source, otherwise the aircraft symbol will remain stationary. Check this before you rely on it: The airplane mode test on the ground looks completely normal on a Wi-Fi-only iPad because the map is there.

FLARM bypasses the internet, but only shows FLARM. If a FLARM device is connected to the iPad via Wi-Fi, its targets are mixed into the same traffic layer as ADS-B, and FLARM collision warnings remain active as a safety feature, regardless of whether you have the traffic layer enabled or disabled on the map. This is a direct connection between two devices in the cockpit and has nothing to do with cellular service. Without a network, however, you will only see FLARM-equipped aircraft; the internet-based ADS-B component is completely absent. The traffic layer is not a certified collision warning system, and airspace observation remains your responsibility.

Why is "map offline" alone not enough?

A stored map alone does not make flight navigation. The map shows you valleys and towns, but it doesn't show you that on the way from Augsburg (EDMA) to Friedrichshafen (EDNY), the Memmingen control zone cuts across the direct course.

The difference lies in the aeronautical layers above: airspace classes with upper and lower limits, mandatory reporting points, frequencies, traffic patterns, restricted areas. These are precisely the layers that distinguish a Navigation app for pilots from a hiking app, and these are precisely what are missing if an app only caches map tiles.

In EuroPilot Connect, the moving map, i.e., the live map in the cockpit, draws terrain and aeronautical layers from the offline data during the flight. The country package persists across app restarts, and the country selection is synchronized across your devices.

Instructions: download a country offline and check offline operation

The test takes less than ten minutes and is done on the ground. Do it once before you rely on it for the first time.

1. First, check if your device has GPS at all. Only iPads with a cellular module have a GNSS receiver. If it's missing, you'll need an external GPS source before the rest makes sense.
2. Download the country you are flying in. Tap it in the country selection and wait for the progress to complete. The package includes the base map, terrain, airfields, airspaces, navaids, runways, reporting points, traffic patterns, and airfield layouts.
3. Download the neighboring countries you might divert to. For a flight from Augsburg (EDMA) heading south, this includes Austria and Switzerland, not just Germany. Alternate airfields are often across the border.
4. Check on each device individually that the package is actually loaded. Don't rely on the second device having the same status as the first device.
5. Get the weather briefing and NOTAM briefing for the route, as long as you still have network access. Both are snapshot data: the status you have now is the status you fly with.
6. Switch the device to airplane mode and then restart the app once. No Wi-Fi, no mobile data.
7. Trace the route on the map and zoom in. Do terrain, airspaces, airfields, and reporting points remain visible? Gray tiles or a loading spinner are a sign that a piece is missing.
8. Call up your destination and an alternate airfield. Frequencies, runway direction, and traffic pattern must be available without a connection.
9. Check your device's charge level and the mount. The best offline map won't help if the iPad shuts down in the sun.

If something remains blank in step 7 or 8, you noticed it on the ground instead of in the valley. That's exactly what the test is for.

What happens if the connection breaks mid-flight?

The moving map draws terrain and aeronautical layers from the offline data. A loss of connection therefore does not affect these layers: offline is the basis on which the display operates, and not an emergency mode it falls into.

What does change are the live layers. If you lose reception in the Allgäu or the Alps, the weather picture ages from that moment, and internet-based traffic disappears. Both are not defects, but the nature of this data. The important thing is that you know which display is current and which is old.

Do you still have to carry a paper chart?

Current and suitable chart material is required, not paper. For non-commercial operations with aircraft other than technically complex motor-powered aircraft this is regulated in the EU by NCO.GEN.135 in Annex VII (Part-NCO) of Regulation (EU) No 965/2012: Current and suitable aeronautical charts for the area of the planned route and for all routes to which the flight could reasonably divert must be carried. The associated GM1 NCO.GEN.135 states that documents may also be available in forms other than printed paper and an electronic storage medium is acceptable, provided accessibility, usability, and reliability are ensured. GM stands for Guidance Material, i.e., explanatory accompanying material, not the regulation text itself. The consolidated regulatory text including AMC and GM is published by the EASA in the Easy Access Rules for Air Operations.

Four restrictions you must check yourself:

• Gliders and balloons do not fall under Part-NCO. Separate European regulations with their own requirements for documents to be carried apply to them.
• Ultralight aircraft are regulated nationally in Germany and also do not fall under Part-NCO. However, this explicitly does not mean that there is no chart requirement: The obligation to familiarize oneself with all available information before the flight is stated in SERA.2010 of Implementing Regulation (EU) No 923/2012 and applies unchanged, as do the national requirements. What specifically applies to your aircraft should be clarified through your association and the responsible authority.
• "Reliability ensured" is a requirement for you, not for the app. In practice, this means: a second device, a charged battery, and a power supply in the aircraft.
• National peculiarities remain your responsibility. The official bases come from a separate body for each country: in Germany from the DFS DFS with the AIP VFR, in Austria from Austro Control Austro Control, in Switzerland from Skyguide Skyguide.

EuroPilot Connect is not certified navigation equipment. The official documents of your aviation authority remain authoritative, and an app replaces neither your flight preparation nor your decision as the pilot in command. It only makes preparation faster.

How do you keep offline data current?

Aeronautical data follows the AIRAC cycle: a cut-off date every 28 days, the same worldwide, as determined by ICAO. EuroPilot Connect resynchronizes the aeronautical data with the server when a new cycle begins; this does not require an app update from the store.

For you, this means: If you haven't flown for a while, open the app with network access before your next flight. Anyone who takes a three-month break in winter skips three AIRAC cut-off dates. A country package from back then might show you an airspace boundary that no longer exists.

And the exception that is easily overlooked: NOTAMs appear continuously and are not tied to the 28-day cycle. A closed runway, a temporarily activated ED-R, a failed lighting system: these occur between two cut-off dates. EuroPilot Connect collects NOTAMs server-side and displays them in a geographical context along your route. The collection happens on the server, not on your device: without a connection, nothing is reloaded, and your NOTAM status ages. NOTAMs are not included in the country package. Get the briefing shortly before departure, not the evening before. Official aviation weather for Germany comes from the DWD.

What are the ways to get an offline map anyway?

Offline doesn't necessarily mean an app. In practice, you'll encounter three ways, and many pilots combine them:

• The country package of a navigation app. In EuroPilot Connect, the map and aeronautical layers are together on the device, and the position updates live. This is the method described in this article.
• The official AIP VFR and approach charts as PDF. The publisher for Germany is the DFS DFS via the AIP VFR, for Austria Austro Control, for Switzerland Skyguide. Conditions and procurement methods are available there firsthand.
• The printed ICAO chart 1:500,000. Requires no power or reception, but ages between two editions.

Which method suits you depends on how you fly. The combination of a loaded country package and a second, independent source is the approach that ensures you're not without a chart if a device fails.

Common errors in offline navigation

• Only the departure country loaded. From Lake Constance, you're across a national border in a few flight minutes. Download the neighboring countries as well.
• Relied on the cache. What you looked at yesterday is not a loaded package. Only a conscious download is a stored asset.
• Second device never checked. The iPad in the side pocket is only useful if it has loaded the same package.
• Weeks without network contact. There are 28 days between two AIRAC cut-off dates. A winter without flying skips several of them.
• Assumed weather was current. Without a connection, the weather picture silently ages. Remember when you last loaded it.
• Wi-Fi iPad without external GPS source. Map is there, position is not. Not noticeable on the ground.
• Only tested in flight. The airplane mode test can be done on the ground in a few minutes.

How to test any other app in ten minutes

The following test works in any app, regardless of the manufacturer, and it answers the question that no advertising text answers:

1. Download what the app offers as offline content, and note which data layers are mentioned.
2. Turn on airplane mode and restart the app again. Content that doesn't survive a restart isn't truly stored.
3. Zoom to a route you've never opened before. What appears there did not come from a cache.
4. Search for airspaces, reporting points, and the traffic pattern of your home airfield. A map alone is not enough.
5. Check what the app says about the age of the data. A visible status is worth more than a promise.

If you want a broader overview before that, you can find it in the VFR App Guide; how the map works in the cockpit itself is described in the flight navigation apps.

Frequently Asked Questions (FAQ)

Does a flight app work without internet? Partially, and that part is the crucial one. Map, terrain, airfields, airspaces, navaids, reporting points, and traffic patterns work without a connection if you have downloaded them beforehand as a country package. Weather, NOTAM, and internet-based traffic, however, require a connection because they are live data.

Does GPS work in an airplane without reception? Yes, provided your device has a GNSS receiver. GPS only receives satellite signals and does not require cellular or Wi-Fi. Important: Only iPads with a cellular module have a built-in GNSS receiver. Pure Wi-Fi iPads do not and require an external GPS source.

How do I download VFR charts offline to my iPad? In EuroPilot Connect, you tap the country and download it as a package. This includes the basemap, terrain, airfields, airspaces, navaids, runways, reporting points, traffic patterns, and airfield layouts. The content is retained across app restarts, and the country selection is synchronized across your devices.

Do I get NOTAMs and weather offline? No, neither will update without a connection. Weather is purely live data. NOTAMs are not included in the country package; they are collected server-side and displayed along your route, but reloading them requires a connection. The same applies to both: get your briefing shortly before takeoff. This is the information you fly with.

Are paper charts mandatory for VFR in Germany? Current and suitable chart material is mandatory, not its form. NCO.GEN.135 in Part-NCO of Regulation (EU) No 965/2012 requires current and suitable aeronautical charts for the route and possible alternate routes for non-commercial operations with non-complex motor-powered aircraft; GM1 NCO.GEN.135 explicitly permits electronic forms, provided accessibility, usability, and reliability are ensured. Separate regulations apply to gliders, balloons, and ultralight aircraft.

How often do I need to update the offline data? At least once per AIRAC cycle, i.e., every 28 days. EuroPilot Connect resynchronizes the aeronautical data with the server when a new cycle begins; you just need to open the app with an internet connection once.

Which countries does the map cover? The self-hosted base map covers 25 European countries. You decide which countries to download as a package to your device in the country selection within the app.

Conclusion

Offline flight navigation is a matter of preparation, not a product feature. The app can only provide what you have told it beforehand, and it fundamentally cannot provide anything that only arises in the air. Those who know this limit will not be surprised by it.

EuroPilot Connect is built as a native iOS app, loads entire countries with all aviation layers onto the device, and draws the moving map in flight from this data. Weather, NOTAM, and traffic remain what they are: live data with a specific status. You can download the app from the App Store; the license costs 99 € per year for up to three devices, is purchased on the website, and the first 30 days are free.

Try EuroPilot Connect for 30 days free