YB NAVLOG

VFR NAVIGATION LOG

User Guide

For the best experience, please use the desktop Chrome browser.

Why I Built This Tool ↗
What you'll get: A printable PDF ↗
Hate reading instructions? Just hit the SAMPLE button at the top to see how it looks, clear it with the , and fill out the fields as they come up.
Data Storage: saved to this browser only, not a permanent or shared store — use export / import to save or load a plan as a file.
Input Order: Enter data in the order shown. Click the in Header to see how the values relate. (colors match the tooltip colors below)
- Pink = POH
- Blue = Weather
- Purple = Compute
Tooltips: hover any of these icons (tap on mobile) for a detailed explanation of exactly where to pull that value from.
- P Check the POH (written against the PA-28-161)
- W Check the Weather
- C Compute (CX-3/E6B)
Input Guide: every section has a ? button next to its header — click it for a detailed guide on how to use that section.

Resources

POH

Route Planning

Weather

FAA

Tools

Meta Data

Date

Time UTC

Departure

Destination

Alternate

Routes

Cruise Data

i- VFR/IFR cruising altitude rule
- MEF (Maximum Elevation Figure)
- Airspace
- Wind (tailwind preferred)
- Cloud clearance
- Icing
- Turbulence
- Aircraft performance
- Terrain
- Oxygen requirement Cruise ALT ft

WProg charts isobar (Aviation Weather) Altimeter inHg

Use inHg (27.00–32.00), not hPa/mb

CPressure Altitude

*required: Cruise Altitude/Altimeter PA ft

WOutside Air Temperature
- Winds Aloft (ForeFlight)
- Wind/temp data (Aviation Weather) OAT °C

PFuel Consumption (Gallon Per Hour)
- POH 5-18 Engine Performance
- Best power 65% recommended
- Check aircraft's serial no.
GPH

PCruise Power Setting
- POH 5-18 Engine Performance
- Best power 65% recommended
- Check aircraft's serial no.

*required: Cruise OAT/PA RPM

PTrue Airspeed
- POH 5-22 Best Power Cruise Performance
- 65% recommended
- Check aircraft's serial no.

*required: Cruise OAT/PA, Power setting

Don't forget "subtract 7kts if wheel fairings are not installed” TAS kt

CCalibrated Airspeed
- Flight computer (CX3/E6B)

*required: Cruise OAT/PA/TAS CAS kt

PIndicated Airspeed
- POH 5-11 Airspeed System Calibration
- Convert CAS to IAS

*required: CAS IAS kt

Navigation Data

Distance

—nm

ETE

—

Flight Fuel

—gal

Leg

iVOR

iCRS

iALT

iDist

iMagnetic Course
- True Course ± VariationMC

iVariation
- VFR Sectional Chart
- Magnetic north ≠ true north
- East Least (-), West Best (+)Var

iDeviation
- Aircraft's magnetic field
- Compass correction cardDev

PTrue Airspeed
- Climb: 79 / Descend: 90
- Cruise: POH 5-22 Best Power Cruise Performance (65%, serial nos)TAS

WWind Direction
- True North is used
- Winds Aloft (ForeFlight)
- Wind/temp data (Aviation Weather)Wind Dir

WWind Speed
- Winds Aloft (ForeFlight)
- Wind/temp data (Aviation Weather)Wind Spd

CTrue Course
- Measured on Sectional Chart (True North)TC

CWind Correction Angle
- Flight computer (CX3/E6B)
- input: TC, TAS, Wind dir/spdWCA

CGround Speed
- Flight computer (CX3/E6B)
- input: TC, TAS, Wind dir/spdGS

CMagnetic Heading
- Magnetic Course ± WCAMH

CCompass Heading
- Magnetic Heading ± DeviationCH

CEstimated Time of Enroute
- input: GS, DistanceETE

CFuel Consumption
- input: GPH (gallon per hour), ETEFuel

P POH 5-19 Climb Performance
- FPM = average of (Airport PA FPM, Cruise PA FPM)
- Chart is based on MGW
- At checkride weight (~2100 lbs, full tank): add ~+150 fpm

- Realistic Vy climb: 600–700 fpm

*required: Cruise OAT/PA C CX-3 Climb & Descent
- Input: Dist, GS, RoC/D (Rate of Climb/Descent)
- Output: Desc (=means altitude to climb/descent) On-course Checkpoint

3–5 NM from Departure
POH → FPM
CX-3 → On-course Altitude

P POH 5-20 Fuel, Time and Distance to Climb

*required: Cruise OAT/PA, Departure OAT/PA C CX-3 Climb & Descent
- Input: Desc (Cruise Altitude), GS, RoC/D
- Output: Dist ToC (Top of Climb)

Climb TAS: 79 kts
POH → Total dist to cruise altitude
CX-3 → Total dist to cruise altitude (crosscheck)
TOC Dist = Total Dist - On-course Dist

CDistance: (Alt to Lose / 1000) × 3 NM ToD (Top of Descent)

Descend TAS: 90 kts
3° Descent: GS × 5 fpm → 1,000 ft per 3 NM
Distance: (Alt to Lose / 1000) × 3 NM
Alt to lose: Cruise ALT − TPA

BoD (Bottom of Descent)

Target altitude: TPA
3–4 NM from Destination

Nav Log

Press “Generate Nav Log” to build a printable log here.

Fuelgallon

Flight

—gal

—lbs·—

Reserve

—gal

—lbs·—

Total

—gal

—lbs·—

Cfrom Navigation Data Flight

—

iEngine Start / Taxi Ground

—

iTraffic Pattern / Go-Around Landing

—

i14 CFR 91.151 (VFR)
- day +30 min
- night +45 min
14 CFR 91.167 (IFR)
- dest, alter, +45 min Legal Reserve

—

Personal Min

—

Weight & Balance

Aircraft

	Weight (Lbs)	Arm Aft Datum (Inches)	Moment (In-Lbs)
PUse aircraft-specific value from the latest maintenance record (NOT sample POH) Basic Empty Weight
Pilot & Front Passenger		80.5	0.00
Passengers (Rear Seats)		118.1	0.00
Baggage		142.8	0.00
C Fuel (48 Gallon Max)	0	95	0.00
Total Loaded Airplane	0.00	—	0.00

P- POH 6-14 C.G. Range and Weight
- POH 2-4 2.13 Center of Gravity Limits Weight vs CG — Normal / Utility

Takeoff & Landing Performance

Airport DB updated Aug 14, 2026

	C PA ft	i DA ft	C Headwind kt	C Crosswind kt
Departure	—	—	—	—
Destination	—	—	—	—
Alternate	—	—	—	—

PPOH 5-14 Normal Short Field Takeoff Distance - No Obstacle

*required: OAT, Airport PA, Weight, Wind (head/tail) Takeoff Distance ft

PPOH 5-32 Landing Performance

*required: OAT, Airport PA, Wind (head/tail) Landing Distance ft

User Guide

Resources

POH

Route Planning

Weather

FAA

Tools

Meta Data

Cruise Data

Navigation Data

P POH 5-20 Fuel, Time and Distance to Climb*required: Cruise OAT/PA, Departure OAT/PA C CX-3 Climb & Descent - Input: Desc (Cruise Altitude), GS, RoC/D - Output: Dist ToC (Top of Climb)

CDistance: (Alt to Lose / 1000) × 3 NM ToD (Top of Descent)

BoD (Bottom of Descent)

Nav Log

Fuelgallon

Weight & Balance

Takeoff & Landing Performance

P POH 5-20 Fuel, Time and Distance to Climb

*required: Cruise OAT/PA, Departure OAT/PA C CX-3 Climb & Descent
- Input: Desc (Cruise Altitude), GS, RoC/D
- Output: Dist ToC (Top of Climb)