Navigation Flying
Navigation best practice has recently come under the spotlight due to continuing airspace infringements and poor radio telephony (R/T) skills.
Various organisations such as GASCo, AOPA and NATS have initiatives to help alleviate this problem aimed at pilots, students and instructors.
Here at Easy PPL, in conjunction with the Easy PPL Navigation Flight Log, we have consolidated into one place below what we
consider to be best practice when Navigation Flying.
We don't just tell you the best practices we teach, but also the reasonings behind those practices. We believe that if you understand the reasoning, you'll be more likely
to both remember and use those practices in your everyday flight planning.
If you are unfamiliar with any of the terms or techniques described below, we
suggest you might like to take a look at the Easy PPL Ground School Navigation Course where you will
learn much more. This and other courses can be found at
Easy PPL Ground School.
To obtain more information, click on one of the headings below, or to expand/collapse all headings, click
Human Factors
We are all human, and consequently, we are all fallible.
Designing a system
that helps prevent errors in the first place is a key part of infringement
avoidance and inherently increases safety.
One of the key factors is the quality of the Navigation Flight Log in use,
and its design in the areas of prevention of mistakes by the pilot.
Time and again, many infringements occur where one of the factors is a case
of mis-interpretation of the Navigation Flight Log.
For this reason a Flight Log should separate the navigation calculation
figures from the actual heading and times to fly - just like the
Easy PPL Navigation
Flight Log does.
Our top tip, is that whatever Flight Log you use, ensure you don't fall into a
trap of looking at the wrong figure and flying that as the heading.
Time is Important
The planned time on each leg is an essential piece of information that is often
the first to go by the wayside in navigational flight.
Here's a few golden
rules to help not miss the next waypoint!
- Ensure to note the "Set Course" time on the Flight Log (many logs don't
event prompt for this)
- Having performed some other initial checks (see the other headings to
this best practice page), be sure to calculate the next waypoint
Estimated Time of Arrival (ETA), and an ETA for an interim point
(such as half-way)
- 2 minutes before that ETA, start looking ahead of the aircraft
for the waypoint
- At the ETA, if the waypoint is not seen, do not blindly carry on,
but try to gain a position fix. Remember that often, if your planning has
been good, it may be the waypoint is hidden under the nose. Perform a turn
to the left to gain the best view from the pilots perspective to establish
ground features
- At the waypoint, note the Actual Time of Arrival (ATA) on the log. If
this is an interim waypoint, adjust your next calculated waypoint ETA
accordingly (e.g. if 1 minute late for the half-way point, then 2 minutes
will need to be added to the next waypoint ETA)
Set Course and Turning Point Actions
Once the initial Set Course heading is being flown, or immediately after changing
heading at a waypoint, the following actions should be performed.
- Note down the time the new heading was established
- Perform a gross error check on the selected heading. Use large ground
features such as "sea-side to the right and large town on the left" to
determine this
- Perform a FREDA check, with an emphasis of aligning the Direction
Indicator (DI) with the magnetic compass - whilst in unaccelerated, straight
and level flight
- Calculate the next ETA based on your set course time and the planned
estimated time for the next leg
- Make radio calls as appropriate
Remember: Aviate, Navigate, Communicate. In that order.
Error Correction
If it is established that an error has occurred, and the current position is off
course, a simple method of error correction should be used.
We recommend the
"Standard Closing Angle" for its simplicity.
For example, a simplified version of the standard closing angle method of
course correction is to fly a set heading correction (based on the aircraft TAS)
for the same amount of time in minutes, as the aircraft is off track in nautical
miles. i.e. For an aircraft with a TAS of 90kt, and being off course 5nm
to the right, a turn to the left of 40o (the Standard Closing Angle) should be made, and held, for 5
minutes. The 40o change of heading is always
the same for an aircraft with a TAS of 90kt.
For more details, including how to calculate the Standard Closing Angle for
aircraft that operate at different True Airspeeds, we recommend learning more
from the Easy PPL Ground School Navigation Course. This and other courses can be found at
Easy PPL Ground School.
Plan Ahead
Think and plan ahead as far as possible.
- Select the next radio frequency before the need to use it
- Use the second radio (COM2) if you have it, to listen to the ATIS whilst
also listening to the current ATC frequency
- Plan circuit joining procedures early
- Inform others to publicise your intentions and increase everyones
situational awareness
For more tips and techniques on communications, see the Easy PPL Ground School Communication
Course. Full details on this and other courses can be found at
Easy PPL Ground School.
Fuel Management
Many Navigation Flight Logs have little in the way of in-flight fuel management
assistance.
Regular checks on fuel quantities and time should be made as part
and parcel of the navigation flight procedures.
In our opinion, one of the key principles of fuel management is to manage the
fuel in the unit that is most appropriate. That unit is TIME.
The pilot does not need an increased workload in calculating how much time is
remaining for a given quantity of fuel and a given fuel burn, especially when
that calculation is having to be made under pressure, such as during a bad
weather divert.
So, keep it simple. Manage the fuel in units of time, not gallons or litres.
The Easy PPL Navigation Flight Log allows this type
of fuel management to occur naturally, with prompts for the pilot to enter the
time remaining in two boxes - one for the left tank, one for the right
tank. After every 30 minutes, tanks are changed, and the time remaining is
decremented. The remaining fuel endurance is simply a matter of adding up the
minutes in the "time remaining" boxes on the navigation flight log.
One other thing. When changing tanks, do so every 30 minutes. We recommend as
a best practice that the easy way to do this is to use the right tank when the
minute hand of the current time is between 0 and 30 minutes, then swap tanks,
and use the left hand tank when the minute hand of the current time is between
30 and 59 minutes.