Nov 12 Navigation and Flight Basics

Quiz Schedule
- The quiz for the week's lessons is scheduled for Monday.
- Presentations will begin following the quiz.
Attendance Policy for Presentations
- Participation in all presentations is mandatory to earn points.
- If absent due to illness, a doctor’s note is required.
- Any issues such as car breakdowns must also be proven.
- For any scheduling conflicts, students must notify and resolve them beforehand, as attendance is compulsory.
- For student trips, a note from the faculty adviser of the group involved is required.

Defined as the process of determining one’s position and planning a route to a destination.
Key topics explored:
- Finding position on Earth’s grid.
- Understanding latitude and longitude coordinates.
- Time zone concepts, especially in aviation.
- Converting between local time and Zulu time.
Speed Measurements:
- Nautical miles per hour (NMPH) versus statute miles per hour (SMPH):
- Nautical miles are used for aviation and maritime navigation.
- Conversion between NMPH and SMPH was explained.
Calculations related to navigation:
- Determining required speed for a given distance and time.
- Estimating distance based on aircraft speed and available time.
- Time estimations based on known speed and distance.

Wind as a crucial factor for navigational adjustments:
- In a windless environment, aircraft can travel straight to the destination.
- Wind can act as a hindrance or a facilitator:
- Tailwind speeds up the journey.
- Headwind slows down the journey.
- Winds at angle can push the aircraft off course (drift).
Wind Direction Terminology:
- Navigation refers to the direction an aircraft is heading toward.
- Wind direction refers to where the wind originates from.
Ground Speed versus True Airspeed:
- Ground speed will differ from true airspeed when wind is involved.
- Example:
  - True airspeed of 120 knots with a tailwind of 20 knots:
  - Ground speed = 140 knots.
  - True airspeed of 120 knots with a headwind of 20 knots:
  - Ground speed = 100 knots.
Drift Angle and Course Correction:
- Adjusting the angle of the flight due to wind is akin to canoeing against a river current.
- To maintain course, one must correct heading based on wind effects.

Definition: A correction made to adjust the aircraft’s heading to compensate for wind drift.
Example:
- Flying from Oklahoma City to Shawnee aiming a course of 090 degrees (east) with a north wind at 20 knots requires adjustment.
- Drift angle calculated leads to revised true heading.
The interaction of wind correction with true course and heading needs to be understood for effective navigation.

Definition: Density altitude describes the pressure altitude corrected for nonstandard temperature.
Best flight conditions occur at lower temperatures, altitudes, and humidity levels.
High density altitude leads to reduced aircraft performance, requiring more runway for lift-off and a slower climb rate.

True North vs. Magnetic North:
- True North refers to the geographic North Pole.
- Magnetic North indicates where the compass needle points, differing due to the Earth’s magnetic field.
Magnetic Variation: The angle difference between true north and magnetic north at a specific location.
- Represented through isogonic lines which connect locations with equal magnetic variation.
- Example for Norman: six degrees east variation.
- Variation changes based on geographic location.
Ergonic Line: A line where there is zero magnetic variation (true north aligned with magnetic north).

Definition: The compass error caused by magnetic interference from the aircraft’s structure or installed equipment.
Deviation can be indicated on a deviation card that helps calculate corrections during flight planning.

Definition: Navigation technique that relies on calculations of airspeed, course, heading, wind direction, and elapsed time to determine positions and path.
Skills utilized include:
- Wind Correction Angle calculation.
- True heading determination vs. true course impacted by wind.
Example calculation for trip from Chickasha to Guthrie.
- True course: 031 degrees.
- Wind: 360 degrees at 10 knots.
- Deviation and various headings adjusted cumulatively yield destination arrival calculations.

Definition: Navigation using visual landmarks or terrain features.
Utilizes sectional charts or direct observation of the ground to assist navigation.
Limitation: Cannot be used effectively when visual references are not available.

Definition: Using ground or satellite-based radio navigation aids for determining and maintaining desired courses.
Ground Navigation Aids:
- Example: Tuning into VOR for direct navigation from one point to another.
- DME measurements for distance and satellite signals for triangulation.
GPS: A form of radio navigation maintained by the US government.
- Functions through satellite triangulation to determine position accurate to a small margin.
- Historical evolution from 24 satellites to the current constellation with over 34 satellites.

Reminder for students: The quiz will take place on Monday.
Students’ presentations will commence right after the quiz.
Required expectations regarding attendance and proof for absences were reviewed.
Emphasis on the importance of understanding these navigation concepts for safe and accurate flight operations.