Building the navigation log from scratch and the pencil-and-paper flight plan that proves you can fly without the iPad

A hand-built navigation log is the foundation of real cross-country flight planning. By working through each column — true course, magnetic variation, wind correction, ground speed, and fuel burn — you develop an understanding of the forces acting on your airplane that no app can replace. This skill is essential for the private pilot checkride and, more importantly, for the day your iPad dies at 4,500 feet.

Digital tools like ForeFlight and Garmin Pilot are excellent, but they obscure the process. The day you can build a nav log from a blank sheet, a sectional chart, and a plotter is the day you actually understand cross-country flying. Everything before that is following a moving map.

How Do I Pick the Right Route for My Nav Log?

A straight line from departure to destination is your starting point — not your final route. Before committing to that course, examine the sectional chart for everything between the two airports.

Look for restricted airspace, MOAs, Class Bravo or Charlie airspace, high terrain, and long stretches over water or featureless land with no emergency options. Sometimes the smarter route adds 10–15 nautical miles but keeps you clear of airspace you do not want to bust and gives you landing options the entire way.

Choose waypoints that are easy to identify visually: prominent intersections, towns, lakes, and airports along the route. These checkpoints serve double duty — they verify both your position and your timing in flight.

How Do I Calculate True Course and Magnetic Course?

True course is the direction from one checkpoint to the next, measured against a line of longitude on the sectional chart. Lay your plotter along the course line, align it with a meridian, and read the angle. Make sure you read it in the direction of flight — reading 180 degrees off because you grabbed the wrong end of the scale is a common and costly student mistake.

Write down the true course for each leg. Five checkpoints means four legs, and each may have a slightly different course. If it reads 073°, write 073°. Precision now prevents compounding errors later.

Next, apply magnetic variation. On the sectional, dashed magenta isogonic lines show the difference between true north and magnetic north. The memory aid: “East is least, west is best.” Subtract for east variation, add for west.

True course plus or minus variation gives you magnetic course — the direction your compass would indicate with no wind and no compass errors.

How Do Wind Correction and the E6B Work?

Wind is where the nav log separates rote planning from genuine understanding of what your airplane is doing in the air.

You need the winds and temperatures aloft forecast at your planned cruising altitude. Flying at 5,500 feet? Use the 6,000-foot winds, the nearest reported level.

The E6B flight computer — manual or electronic — takes your wind direction, wind speed, true course, and true airspeed, and returns two critical numbers:

• Wind correction angle (WCA): How many degrees to crab into the wind to hold your course.
• Ground speed: How fast you are actually covering distance over the ground.

Apply the wind correction angle to your magnetic course. Wind from the left, add. Wind from the right, subtract. This gives you your magnetic heading — the direction you actually point the nose.

One final correction: compass deviation. Every magnetic compass has small errors from the aircraft’s metal and electronics. The compass correction card mounted near the instrument tells you the offset at various headings. Apply it, and you have your compass heading — the number you will actually fly.

The full chain: True Course → Magnetic Variation → Magnetic Course → Wind Correction → Magnetic Heading → Compass Deviation → Compass Heading. Every step matters. Skipping one throws off everything downstream.

How Do I Calculate Time and Fuel for Each Leg?

Measure each leg’s distance on the chart with your plotter in nautical miles. Divide distance by ground speed — not airspeed — to get estimated time en route.

This distinction is critical. A 20-knot headwind can stretch a 30-minute leg to 40 minutes. Planning fuel on airspeed instead of ground speed means coming up short.

For fuel burn, multiply leg time by your aircraft’s fuel consumption rate. If the airplane burns 8 gallons per hour and the leg takes 30 minutes, that is 4 gallons. Do this for every leg, then total them.

Students commonly calculate only cruise fuel and forget the rest. A complete fuel plan includes:

• Taxi and runup fuel
• Climb fuel (burn rate is higher than cruise)
• Cruise fuel for every leg
• Descent and approach fuel
• Reserve fuel

The FAA requires a minimum of 30 minutes of reserve fuel for daytime VFR. That is the legal floor. 45 minutes is a smarter number, and 60 minutes is ideal when tank capacity allows it.

Compare total fuel required to usable fuel capacity. If the math does not work, you need a fuel stop or a different plan.

Why Are Checkpoint ETAs Your Most Important Safety Tool?

Calculate an estimated time of arrival for every checkpoint. Start with your departure time, add the first leg’s duration to get your first checkpoint ETA, then keep adding each subsequent leg.

In flight, these ETAs function as an early warning system. If you planned to cross a lake at 42 minutes past the hour and you reach it at 48 minutes, something has changed — stronger headwinds, a course deviation, or both. You catch it early enough to recalculate and adjust.

Without checkpoint ETAs, you are flying on hope. Hope is not a flight planning strategy.

A Practical Example: Pennsylvania to the Maryland Coast

Consider a 130-nautical-mile flight from central Pennsylvania to the Maryland coast. The route has three visual checkpoints: a reservoir, a town with a railroad intersection, and a nearby VOR.

Winds aloft report a northwest wind at 18 knots at altitude. In a Cessna 172 with a true airspeed of 105 knots, the E6B yields an average ground speed of about 97 knots and a wind correction angle of roughly 8 degrees.

The numbers:

• En route time: ~1 hour 20 minutes
• Cruise fuel at 8.5 GPH: ~11.3 gallons
• Climb fuel: ~1 gallon
• Taxi and runup: ~1 gallon
• 45-minute reserve at 8.5 GPH: ~6.4 gallons
• Total required: ~20 gallons
• Usable fuel capacity: 56 gallons — plenty of margin

Now consider the winds shifting to 28 knots instead of 18. Ground speed drops, en route time increases, fuel burn climbs. This is exactly why checkpoint ETAs exist. When you cross that reservoir six minutes late, you know the winds have changed, and you can recalculate your fuel picture immediately.

What Will the Examiner Expect on the Checkride?

The Airman Certification Standards for the private pilot certificate require you to:

• Plan a cross-country flight using appropriate charts, publications, and navigation systems
• Identify and select appropriate checkpoints
• Calculate headings, ground speeds, and fuel requirements
• Arrive within a few minutes of your planned time

Beyond the numbers, the examiner wants to see that you understand the process. They may ask what happens if winds change. They may close your destination and ask you to divert using the same skills. If your only experience is tapping a screen, that conversation will be short and uncomfortable.

How to Practice This Skill

Before your next cross-country — training or recreational — build a nav log entirely by hand. Chart, plotter, E6B, pencil. Then compare your numbers to what your app produces. They should be close. If they diverge significantly, track down the error. Was it the variation? The wind correction? The ground speed calculation? Finding the mistake teaches more than getting it right the first time.

Fly the trip with both your paper nav log on the kneeboard and the app on the iPad. Cross-check checkpoint ETAs against reality. That feedback loop is where real pilot knowledge develops.

Keep your nav log clean and legible. On a checkride, the examiner will review it. A messy, crossed-out sheet signals rushing or confusion. A clean one with clear numbers demonstrates serious planning — and gives you numbers you can trust when you are bouncing around at altitude trying to spot that reservoir.

Key Takeaways

• The correction chain matters: True Course → Variation → Magnetic Course → Wind Correction → Magnetic Heading → Deviation → Compass Heading. Skipping any step cascades errors.
• Always use ground speed, not airspeed, for time and fuel calculations. Wind changes everything.
• Checkpoint ETAs are your in-flight early warning system. A six-minute discrepancy tells you the plan needs updating before fuel becomes critical.
• Complete fuel planning includes taxi, climb, cruise, descent, and reserve — not just the en route portion. Plan for at least 45 minutes of reserve.
• Build by hand, then verify with your app. The gap between your numbers and the software’s numbers is where the deepest learning happens.