The VFR navigation log and turning a line on a chart to a heading on your compass

A VFR navigation log turns a line on a sectional chart into a flyable heading on your compass. The process covers 10 core steps: drawing your course, measuring true course and distance, selecting checkpoints, applying winds aloft, calculating wind correction angle and ground speed, converting to magnetic and compass headings, and computing time and fuel. Mastering this workflow is essential for private pilot checkride preparation and for building the dead-reckoning skills that keep you safe when electronic navigation fails.

Why Do You Need to Know Manual Cross-Country Planning?

Cross-country planning is a required element of the Airman Certification Standards under navigation and flight planning. Your designated pilot examiner will ask you to plan a cross-country on checkride day using a sectional chart, plotter, and E6B — no iPad, no GPS, no magenta line.

Beyond the checkride, the skill matters operationally. Electronics fail. Batteries die. Screens overheat on hot ramps. If you cannot navigate with a chart, a plotter, and a watch, you have a single point of failure in your cockpit. When you do the math by hand, you build intuition that no app can replicate — understanding why a headwind eats your fuel, why the same trip takes 20 minutes longer in winter, and why a two-degree compass error over 200 miles puts you six miles off course.

Step 1: How Do I Draw the Course Line?

Find your departure and destination airports on the sectional chart. Draw a straight pencil line between them. This is your course.

In practice, you may need to deviate around restricted airspace, terrain, or obstacles. If so, break your route into legs with turning points, and give each leg its own line on the nav log.

Before doing any math, scan that line. What does it cross? Look for Class B or C airspace shelves, military operations areas, tall towers, and terrain. This big-picture scan prevents surprises later.

Step 2: How Do I Measure True Course With a Plotter?

Align your plotter along the course line and read the true course from the nearest line of longitude. True course is measured from true north.

The most common student error here is reading the wrong direction. If you’re flying east and accidentally read the westbound course, you’re off by 180 degrees, and that error cascades through every calculation that follows. Double-check the direction before writing it down.

Step 3: How Do I Measure the Distance?

Use the mileage scale on your plotter. Match the scale to your chart type:

• Sectional chart: 1:500,000
• Terminal area chart: 1:250,000

Mixing up the scales will produce wildly incorrect distances. Measure the total distance along your course line.

Step 4: How Do I Pick Good Visual Checkpoints?

Checkpoints are visual references that confirm your position along the route. Space them roughly every 15–20 nautical miles, which gives you a position fix every 10–15 minutes in a typical trainer.

Good checkpoints are unique and unmistakable from altitude:

• A town adjacent to a distinctive lake
• A highway intersection
• A railroad crossing a river
• An airport along your route
• A power plant with cooling towers

Bad checkpoints blend into the landscape:

• A single road in uniform farmland
• A small pond surrounded by dozens of similar ponds

Write each checkpoint on a separate line of the nav log and measure the distance between each pair. These are your leg distances.

Step 5: Where Do I Get the Winds Aloft?

You need the winds aloft forecast at your planned cruising altitude before you can calculate headings or ground speed. Sources include Aviation Weather (aviationweather.gov), ForeFlight, or a standard weather briefing.

Winds aloft are reported at fixed altitudes (3,000, 6,000, 9,000 feet, etc.). If your cruising altitude falls between reporting levels, interpolate. For example, if winds at 3,000 are from 270° at 10 knots and winds at 6,000 are from 280° at 20 knots, a reasonable estimate for 5,500 feet is approximately 278° at 17 knots.

Step 6: How Do I Calculate Wind Correction Angle and Ground Speed?

This is where the E6B flight computer does its work. Using the wind side:

1. Set the wind direction under the true index.
2. Mark the wind speed up from the center grommet.
3. Rotate to place your true course under the true index.
4. Slide until the wind mark aligns with your true airspeed arc.

Two results appear. The lateral displacement of the wind mark from center gives you the wind correction angle (WCA). Its position on the speed arc gives you your ground speed.

If the wind pushes you right, correct left, and vice versa. Apply the WCA to your true course to get your true heading. For example: true course of 085° with an 8° left correction yields a true heading of 077°.

A ground speed of 105 knots versus a true airspeed of 110 knots may seem negligible, but over 118 nautical miles that 5-knot difference adds roughly 7 minutes to your flight — which matters for fuel planning.

Step 7: How Do I Convert to Magnetic Heading?

Your compass reads magnetic north, not true north. Apply the magnetic variation for your area, found on the isogonic lines (dashed magenta lines) on the sectional chart.

The classic memory aid: “East is least, west is best.”

• East variation: subtract from true heading
• West variation: add to true heading

Example: true heading of 077° in an area with 12°E variation → magnetic heading of 065°.

Step 8: What About Compass Deviation?

Your magnetic compass has small errors caused by metals and electronics in the aircraft. The compass correction card, mounted near the compass, lists deviation on various headings. The adjustment is typically only a degree or two, but your examiner expects to see you apply it. After this correction, you have your compass heading.

Step 9: How Do I Calculate Time en Route and Fuel Burn?

Time: Divide distance by ground speed. For 118 NM at 105 knots ground speed, the result is approximately 67 minutes (1 hour 7 minutes). Calculate this for each leg so you know when to expect each checkpoint.

Fuel burn: Reference the performance data in your aircraft’s Pilot’s Operating Handbook (POH). A Cessna 172 at 65% power burns roughly 8.5 gallons per hour. For 67 minutes of flight, that’s approximately 9.5 gallons en route. Add fuel for taxi, run-up, and climb.

Required reserves under 14 CFR: You must land with at least 30 minutes of fuel remaining during the day (VFR) and 45 minutes at night. These are legal minimums, not planning targets. Planning for a full hour of reserve fuel is a sound practice.

Step 10: How Do I Complete the Rest of the Nav Log?

For each leg, your nav log should now include:

• Checkpoint name
• True and magnetic course/heading
• Distance
• Estimated ground speed
• Estimated time en route
• Fuel burn
• Cruising altitude
• Radio frequencies for airports along the route
• ATIS frequency at the destination

If a box exists on the form, fill it in.

The Sanity Check That Catches Mistakes

After completing the nav log, spend five minutes on a big-picture review. Does your total fuel burn leave adequate reserves? Is your estimated time en route reasonable? A Cessna 172 covering 118 NM should take roughly an hour — if your log says 30 minutes or 4 hours, something went wrong. Trust your instinct, then verify the math.

Always obtain a full weather briefing separately. The nav log is the plan, but TFRs, runway closures, and convective activity along your route feed your go/no-go decision — and none of that appears on the nav log itself.

What Will the Examiner Ask on Checkride Day?

A common checkride scenario: the examiner says you’re 20 minutes into the flight and 3 miles south of your expected position. What do you do? If you understand how your heading was calculated, you can reason through it — maybe the winds shifted, maybe the correction angle was off. You adjust, pick up your next checkpoint, and continue. If you only copied numbers from an app, you’re stuck.

The examiner isn’t testing whether you use the E6B perfectly. They’re testing whether you understand the process and can make sound decisions with the results.

How Long Does All of This Take?

The first few times, expect the process to take about 45 minutes. With practice, you can complete a nav log in 15 minutes. Each repetition builds the kind of pilot judgment that keeps you safe when the technology fails.

Key Takeaways

• A VFR nav log follows 10 sequential steps — from drawing the course line through calculating compass heading, time, and fuel
• Wind correction and magnetic variation are where most student errors occur; double-check the direction of your course and the sign of your corrections
• Checkpoint selection is a skill — choose unique, unmistakable features spaced 15–20 NM apart
• Fuel reserves are legal minimums, not targets — plan for at least one hour of reserve fuel
• Understanding the manual process builds aviation judgment that electronic tools cannot replace, and it is a checkride requirement under the ACS