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#21
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Bearing and Course, differences?
If I took a magnetic bearing to a lighthouse, buoy, or daymark and followed
that bearing, I would either hit the buoy or run aground. This reminds me of the old joke "Captain: "What's your course, helmsman?" Helmsman: "Dead ahead, sir!" Bob "Guillermo" wrote in message oups.com... On Aug 31, 2:11 am, Dallas wrote: On 30 Aug 2007 05:00:02 GMT, Allen Smith wrote: Can somebody give me easy examples to understand? My next flight lesson is scheduled for next week... First, Bob Gardner's post is very clear and correct. So you are saying that there is not such thing as a magnetic bearing to a station, which is the direction of travel needed to go directly to a station (referenced to the magnetic north)? |
#22
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Bearing and Course, differences?
"Bob Gardner" wrote:
If I took a magnetic bearing to a lighthouse, buoy, or daymark and followed that bearing, I would either hit the buoy or run aground. Only on a flat Earth :-) This reminds me of the old joke "Captain: "What's your course, helmsman?" Helmsman: "Dead ahead, sir!" Another old joke: It's a dark night and the lookout on a ship sees a light ahead. The captain gets on the radio and calls, "Vessel located at XXX, alter your course to starboard!". The call comes back, "I'm sorry sir, you please alter your course". This angers the captain, who yells into the radio, "Look here, I'm a captain in the U. S. Navy and I order you to change your course to avoid us!" The response is, "Understood, sir. I'm a seaman third class, and suggest you change your course". The captain thunders, "I'm in command of a Battleship! Now alter your course!!!" The seaman third class responds, "Yes sir, I'm in command of a lighthouse". |
#23
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Bearing and Course, differences?
Dudley Henriques wrote:
Many new student pilots are confused by the many different terms used in the basic navigation glossary. Although mentioned and demonstrated every time instructors are dealing with this issue, many instructors fail to emphasize the single most important point for the student to understand. If this single point is EMPHASIZED early on in the learning curve, it can save a ton of confusion down the line as the student ponders basic navigation problems. That single fact that should be emphasized early on is that a heading is always corrected for wind! You can deal with the courses straight through the chain without a wind correction which can be very confusing to a new student. TC -+ Var= MC -+ Dev= CC Notice no wind correction there, but the student has to deal with wind. You insert a correction for wind anywhere in this chain and you change from dealing with courses to dealing with headings. TC-+ (WCA)= TH-+ Var= MH-+ Dev=CH It's the misuse of the term heading when dealing with charts where the term course is indicated that confuses many students. They fly a heading to make good a course so the whole problem is one of correcting a course on a chart through variation and deviation AND a wind correction to achieve a final compass HEADING. I don't know how many times I've seen something in print that reads like, "What is the heading of that runway?" or "what is the heading of that VOR radial?" It's VERY confusing for new students!! And not always that clear even to old students. :-) Matt |
#24
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Bearing and Course, differences?
On Fri, 31 Aug 2007 10:29:06 -0700, Guillermo wrote:
So you are saying that there is not such thing as a magnetic bearing to a station, Actually, I'm guilty of trying to get into Allen Smith's head and sort things out in a more logical manner for him. He's lumped the terms "course" and "bearing" into the same basket and he's trying to somehow link their definitions. I was trying to draw the distinction for him that the term "course" is most commonly found under the subject heading of dead reckoning and "bearing" is found under the subject heading of instrument navigation. If he could break them apart they would be easier to understand. -- Dallas |
#25
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Bearing and Course, differences?
On Fri, 31 Aug 2007 10:40:25 -0400, Dudley Henriques wrote:
You insert a correction for wind anywhere in this chain and you change from dealing with courses to dealing with headings. TC-+ (WCA)= TH-+ Var= MH-+ Dev=CH Ah... very nice. That subtlety did pass by me. I did however notice that if the term contains "Magnetic" (MH & MC) the correction for Magnetic Variation has been factored in. -- Dallas |
#26
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Bearing and Course, differences?
Dallas wrote:
On Fri, 31 Aug 2007 10:40:25 -0400, Dudley Henriques wrote: You insert a correction for wind anywhere in this chain and you change from dealing with courses to dealing with headings. TC-+ (WCA)= TH-+ Var= MH-+ Dev=CH Ah... very nice. That subtlety did pass by me. I did however notice that if the term contains "Magnetic" (MH & MC) the correction for Magnetic Variation has been factored in. Sometimes pilots flying simple VFR will simply draw a line from A to B paralleling a VOR radial on the chart as a shortcut. This starts you out with a MC line instead of a TC line since the VOR is a MC already corrected for Var. Then if you factor in the wind correction at that point you get a MH...then the Deviation for a final CH for that leg. After take off, you adjust the CH on observed winds aloft to maintain track. This is called the " Good God Almighty, why the hell did they make me do all those damn wind triangles anyway" method used by many newly certificated commercial pilots......many on the way home from taking the flight test :-))) -- Dudley Henriques |
#27
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Bearing and Course, differences?
Allen Smith wrote:
Hey guys, I am a presolo guy, about 11 hours now and getting close to solo. While studying tonight I couldn\'t really figure out the difference between magnetic/true course and magnetic/true bearing. So as far as I understand it, bearing is a referenced heading to somewhere you want to go, for example: I am flying on heading of 060 heading and to and the VOR is on a 090 bearing (Heading of 090 required to fly direct) Course is an intended flight line, so if I plan to fly from a to b (with a heading of 090 to b) My course throughout the flight would be 090, even if I am 30 miles off course, the course would be 090 while the bearing would change, correct? Can somebody give me easy examples to understand? My next flight lesson is scheduled for next week... You seem to be making it more complicated than it is. "Course" (true or magnetic)is the direction you want to go, to get to your destination. "Track" is the direction you actually go. Because of winds or inattention to the compass, it not be the same as your intended course. "Bearing" is simply the direction from one point to another. It can be expressed as magnetic, or true, or relative. You do NOT necessarily want to go there. For example, you may plan to fly a magnetic COURSE of 060 until Mount Granite is exactly off your right wing --a relative bearing of 090-- at a planned distance of ten miles; at that point you change your course to 080 magnetic, to fly directly to your destination. vince norris |
#28
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Bearing and Course, differences?
Allen Smith wrote in
: Hey guys, I am a presolo guy, about 11 hours now and getting close to solo. While studying tonight I couldn\'t really figure out the difference between magnetic/true course and magnetic/true bearing. Great news! As you can see by the millions of diverse responses to this thread, nobody really knows what the difference is, so don't sweat it! Go solo! |
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