compass course. noun. : the course with respect to true north in which a ship or an aircraft is intended to travel.
If the turn is made from north to West, the aircraft banks to the left, and the compass card will tilt down on the left side The magnetic field pulls on the end of the magnet that causes the card to rotate toward East
If the pilot wants to fly a magnetic heading of 120° and the aircraft is operating with radios on, the pilot should fly a compass heading of 123° The corrections for variation and deviation must be applied in the correct sequence and is shown below, starting from the true course desired
To determine compass deviation, the aircraft is parked on a compass rose painted on a level surface such as a ramp or taxiway. All of the electronic equipment is powered on as in normal operation.
Compass course: (cc or CTS) the course which is corrected for both variation and deviation. Magnetic course: (mc) the course which is only corrected for variation. cc + var + dev = tc: this equation shows the connection between the compass course, its errors and the true course.
Definition of compass course : the course with respect to true north in which a ship or an aircraft is intended to travel.
Magnetic Course: True course corrected for magnetic variation. Magnetic Heading: True heading corrected for magnetic variation. You can determine the magnetic variation from a sectional map. True Course: The aircraft's course over the ground relative to true north.
The compass deviation card in your airplane is the little label stuck somewhere near your magnetic compass that tells you about the unresolveable errors that remain between the displayed compass heading and the actual magnetic heading of the airplane.
The error is the compass deviation, which vary from a few degrees east to a few degrees west of Magnetic North as the boat turns around. i.e. Compass Course = Magnetic Course minus the Deviation East of the compass.
Compass Correction The answer is to correct readings from the steering or hand-bearing compass to True, or to “uncorrect” True courses to their equivalent Compass reading for use with the steering compass. For both variation and deviation, the compass error is given as a number of degrees east or west.
Since the beginning of flight, pilots have been using the magnetic compass for navigation. It doesn't matter if you're flying a Piper Cub or a Boeing 747, you'll find a magnetic compass in the cockpits of almost any aircraft.
Simply put, no. According to the FAA's Instrument Procedures Handbook (1-42), "runway heading is the magnetic direction that corresponds with the runway centerline extended (charted on the airport diagram), not the numbers painted on the runway.
Aviation sectional charts use true north for their orientation. The second north—magnetic north—is the location of the molten core of the Earth, which is constantly (and quite rapidly) moving.
Mandating use of the compass also conflicted with FAR 91.205, which requires a magnetic direction indicator for day flight under visual flight rules. All applicants must still demonstrate turns, whether using a magnetic compass or other direction-sensing system.
A placard (correction card) must be installed on, or near, the magnetic direction indicator.
A compass is not necessary for the ABC trek. Surfed the web for a bit and it appears that a drawing compass is not allowed as hand luggage by some airlines but orienteering campasses are just fine. I myself have carried an orienteering compass as hand luggage without any problems.