Is losing GPS considered an in-flight emergency?

No. Losing GPS is an inconvenience, not an emergency. You still have engine power, flight controls, a magnetic compass, and a heading indicator. However, if you become genuinely uncertain of your position and are concerned about fuel or weather, you can declare an emergency at any time.

Should I always carry a paper sectional chart?

Yes. A current, folded sectional chart is your primary backup navigation tool when electronic devices fail. Fold it to your route before departure so it's ready to use immediately.

What frequency should I use if I'm lost and not talking to anyone?

Tune **121.5 MHz**, the universal emergency frequency, or contact Flight Service on **122.2 MHz**. You don't need to declare an emergency — simply state your situation and request assistance.

How often should I reset the heading indicator to the compass?

Check and reset the heading indicator against the magnetic compass at least every **15 to 20 minutes** in straight-and-level, unaccelerated flight. Gyroscopic precession causes it to drift over time.

What is the Maximum Elevation Figure on a sectional chart?

The MEF is a number printed in each quadrangle on the sectional chart representing the highest known obstacle in that area, rounded up with a safety buffer. Flying above the MEF ensures clearance from all charted obstacles in that grid square.

The GPS that goes blank fifty miles from your destination and the pilotage skills you forgot you needed

When your GPS quits mid-flight, the airplane keeps flying just fine — you’re the one with the problem. A GPS failure is not an emergency; it’s an inconvenience that exposes whether you ever learned to navigate without a screen. The pilots who handle it well are the ones who practiced pilotage and dead reckoning before it mattered, carried a paper sectional chart, and gave themselves permission to land somewhere that wasn’t in the plan.

What Should You Do in the First 60 Seconds After a GPS Failure?

Do not troubleshoot the device. Every instinct will tell you to reboot, replug, or fix the screen. Ignore that instinct. Fly the airplane first. Maintain your altitude, maintain your heading, keep your wings level. The airplane doesn’t know the GPS died.

Your heading indicator is still showing the heading you were on — the one that was working fine 30 seconds ago. The magnetic compass is still pointing north. The altimeter still works. You have everything pilots used for roughly 70 years before GPS existed. You just forgot you had it because the screen was doing the thinking for you.

Take a breath. Stabilize. Then start solving the navigation problem.

How Do You Navigate Without GPS Using Pilotage?

Look outside — not a glance, but a deliberate scan of the ground. What’s below you? A town, a highway, a river, railroad tracks, a lake with a distinctive shape? Any single ground feature is a clue. Two features together can fix your position.

Pilotage is the oldest navigation technique in aviation, and it works exactly as well today as it did in 1927. The process is straightforward:

Identify your position using visible ground features
Pull out your paper sectional chart and locate yourself on it
Find your destination and note the heading between the two points
Set that heading on your heading indicator, verify with the compass
Fly the heading while cross-referencing ground features against the chart

This combination of dead reckoning and pilotage is specifically tested on the private pilot checkride under the Airman Certification Standards (ACS). The examiner wants to know: can you navigate without the magic box?

What If Nothing on the Ground Looks Familiar?

This is where pilots make their first bad decision — flying in circles trying to find something recognizable. Do not do this. You will burn fuel and get more lost.

If you’re on flight following, key the mic: “Approach, Cessna 456, I’ve lost my GPS navigation, requesting vectors to my destination.” ATC can see you on radar and knows exactly where you are. There is zero shame in this call. It’s part of what they do.

If you’re not talking to anyone, you have options:

Tune 121.5, the universal emergency frequency. You don’t have to declare an emergency. You can simply say: “Any station, Cessna 456, VFR, lost navigation, requesting assistance.” A center controller, a tower, or another pilot will hear you.
Contact Flight Service on 122.2.
Find the nearest airport and land. It doesn’t have to be your destination. It doesn’t have to be towered. A grass strip with a windsock and a self-serve fuel pump is perfectly fine. Land, regroup, charge your iPad, and figure out your next move on the ground where decisions aren’t time-critical.

Diverting is not a failure. It is the decision that separates good pilots from pilots who end up in trouble.

Which Do You Trust — the Heading Indicator or the Compass?

The compass. Always the compass. The heading indicator is a gyroscope that drifts over time. If you haven’t reset it in 20 minutes, it could be off by 15 degrees or more.

Reset the heading indicator to match the compass in straight-and-level, unaccelerated flight. Now you have a reliable heading reference again.

The compass has its own quirks — acceleration errors, turning errors, magnetic deviation — but it points at magnetic north with a known set of limitations. In turbulence it swings. In turns it leads and lags. You can’t glance at it the way you glance at a GPS track line. Fly steady, let it settle, and read it carefully. This is a perishable skill that rusts when you only follow the magenta line.

How Do You Handle Obstacles Without the GPS Warning Database?

Without a screen, you won’t get the popup alert about towers or terrain ahead. Your backup is already printed on your sectional chart.

Check the Maximum Elevation Figure (MEF) in each quadrangle on the chart. That number represents the highest obstacle in that grid square, rounded up with a safety buffer. If you’re above that number, you’re clear of everything in that box.

When in doubt, climb. Altitude is your friend. Get above the towers, above the terrain, and give yourself a buffer.

How Should You Prepare for GPS Failure Before It Happens?

The real work happens on the ground and during routine flights when everything is working fine:

Carry a current paper sectional chart. Fold it to show your route before departure. It never needs a software update.
Pick visual checkpoints for every cross-country. Highway intersections, distinctive lakes, towns with water towers, railroad crossings. Practice identifying them even with the GPS running. Can you spot your next checkpoint before the GPS says you’re there?
Practice dead reckoning with the GPS covered. On a calm day, fly from point A to point B using only the compass, heading indicator, and your chart. Time your legs. Correct for wind.
Know your communication options. Have the nearest approach frequency ready. Know 122.2 for Flight Service. Have 121.5 accessible. Communication is a tool, not a crutch.
Charge your backup devices and verify battery levels before every flight.

Key Takeaways

A GPS failure is an inconvenience, not an emergency. Fly the airplane first, troubleshoot later.
Pilotage and dead reckoning work — they’re tested on the checkride for exactly this reason.
ATC will help you. Call flight following, Flight Service on 122.2, or 121.5 if you’re lost and concerned.
Land somewhere unplanned if the situation calls for it. The airplane doesn’t care where it’s parked.
Practice without GPS before it fails on you. Cover the screen for 20 minutes on your next flight and navigate the old-fashioned way.