Flight Navigation Log

1. Draw a straight line from Bedford KBED to Stamford (SFM) on Sectional Chart with your Cessna Flight Computer straight edge
1. Pick Checkpoint (FIX) about 8 to 10 miles (make sure you used the Sectional Chart rule and not Terminal Area/WAC
2. Determine altitude to fly based on
1. Obscuration
2. Airspace
3. VFR Course Altitude 

                                                              i.      0-179 deg  odd thousand plus 500

                                                            ii.      180 – 360 deg even thousand plus 500

4. Winds – Turbulence, Winds, temp aloft
5. Other airspace you don’t want to fly in (Boston Class Bravo)
2. This is an example to determine altitude based on obscuration

                       Sectional Chart            Max Height {Sectional Chart Quadrant}

BED                            1600’

LWM                          1100’

Exeter                          800’

SFM                            1300’

4. With the flight computer measure the “True Course” and fill in the Course router on the Navigation log. In this case its (024 degree)
5. Use your airport facility directory (AF/D) and the Sectional Chart to determine:
1. Airport Elevation  
2. Traffic Pattern Altitude (Elevation + 1000’)  SFM = 1300’
3. Airport Runways (draw it on Airport Diagram section on Nav log)
4. The frequencies of:

                                                              i.      ATIS

                                                            ii.      Control Tower

                                                          iii.      Ground Control

                                                          iv.      Common Traffic advisory Frequency CTAF

                                                            v.      Unicom

                                                          vi.      FSS

                                                        vii.      Departure/Arrival

5. Use the  / to indicate TOC top of climb
5. From ATIS (fill in BED wind direction, Velocity and Temperature on the Flight Nav Log
6. From 1-800-WB-Brief (Winds aloft, Temperature) fill in Winds direction and velocity on flight Nav log
1. Rule  - for every 1000’ climb the temperature will drop by 2 degrees C

                                                              i.      So,  if you will be flying at 3,500’ and your temperature at Hanscom ground is +2 degrees,  then the temperatue at 3,500’ will be:  (3,500/1000) * 2 = 7 degree drop or (+2 -7= -5 degrees C)

8. From Skyhawk 172 S Information Manual page 5-19 Cruise performance
1. Since -5 deg C is current temperature at cruising altitude, and standard temperature is 15deg C, then -5 deg C will be “10degrees below standard temperature.  So you will have to use the 20 degrees below standard section.

                                                              i.      Because you are at 3,500’ you will round it up to 4,000’ this roundup will give you 2400RPM, %BHP=65, KTAS=100, GPH=9.1  (information form pg 5-19 section 5 of performance)

                                                            ii.      Fill in GPH 9. and 110 KTS 1 on Nav log

2. From the fuel and distance to climb at 2550 lbs look at 4000 (pressure altitude Feet)

                                                              i.      Climb = 73KIAS, Rate of climb = 600’/sec, time = 6, fuel use = 1.5 gals, distance = 8

                                                            ii.      Fill in 73KIAS on Climb True Air Speed (TAS) on Nav logs

1.      Fuel use = 1.5 Gal + Note 1 “add 1.4 gals to start, taxi and take off allowance.”  This will give you 1.5 + 1.4 = 2.9 Gallons. Put 2.9 gal under fuel on the same line on the Nav logs.

9. Calculate the True Course, TC, True Heading, TH, Magnetic Heading MH
1. Fill in TC =024 = Course Route you have measured directly with your Flight computer on the sectionals chart.
2. From the Flight Computer 

                                                              i.      Set wind direction = 230 degrees under “True Index”

                                                            ii.      Mark wind speed = 11Kts up from center hole

                                                          iii.      Rotate True course = 024 under “True Index”

                                                          iv.      Move slide to put wind dot over TAS (True Air speed) that will give you 4 deg so its left = - 4 degrees

1.      Now you have 024 degrees True Course – 4 degrees wind correction = 020 degrees.

2.      Record 020 on True Heading

                                                            v.      Look at the isotonic line; you will see 16 deg W and 15 deg W.

1.      since you are closer to 16deg W, fill in all the TH with + 16

2.      So  W you are adding  => 20deg + 16deg  = 36 deg

3.      On climbing out, you will have to turn to 36 degrees for your Magnetic Heading flight to SFM.

4.      Record 036 deg on the nav log on MH.

5.      Since deviation is +/- is about the same, record compass heading CH with 036 degrees also.

10. Calculate TC, TH, MH, CH for Cruse at 3500’
1. 024 follow step on compute to calculate the WCA (Wind Correction Angle)

                                                              i.      024 deg – 21 deg = 03 deg

                                                            ii.      03 + 16 =  019 degrees

                                                          iii.      Follow down the chart with

1.      019 for MH and CH. And -21 for WAC

2.      + 16 for VAR

3.      114 for GS (Ground Speed)