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Pilots, check your bearings: Boeing Field catches up with Earth’s magnetic field
Because the Earth’s magnetic field has shifted over the decades, the runway numbers at Boeing Field have just been changed, requiring pilots to pay attention and change their charts. (www.seattletimes.com) Más...Sort type: [Top] [Newest]
We had ours change at CYYC Calgary about a year ago.
Did I miss something?...east west runways @ KPAE and KBFI?...
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Thank you for a spectacularly weird comment!
According to radiometric dating and many, many other sources, the Earth is about 4.5 billion years old, not "millions" or "trillions" and certainly not mere thousands. And it's rooted in observable and measurable facts not mere "belief."
And, no, it has nothing in particular to do with the process of evolution, a process that is easily observable in practice going on *right* *now* -- MRSA, anyone? -- so the connection you're drawing is most bizarre.
And how you jump effortlessly from the migration of the location of the magnetic poles versus the planet's rotational axis to the unrelated topic of the origin of species is just creme de la weird.
Love everything about your comment. Thanks!
According to radiometric dating and many, many other sources, the Earth is about 4.5 billion years old, not "millions" or "trillions" and certainly not mere thousands. And it's rooted in observable and measurable facts not mere "belief."
And, no, it has nothing in particular to do with the process of evolution, a process that is easily observable in practice going on *right* *now* -- MRSA, anyone? -- so the connection you're drawing is most bizarre.
And how you jump effortlessly from the migration of the location of the magnetic poles versus the planet's rotational axis to the unrelated topic of the origin of species is just creme de la weird.
Love everything about your comment. Thanks!
Yes, it is very pleasing to those who don't understand the process and have absolutely no idea what they're talking about in the first place. To everyone else, it's just part of a process that has been going on for literally millions of years, with the poles occasionally reversing completely. Nothing at all unusual about it, and no one is ever "totally confused" about what's going on here unless they were coming into it completely ignorant of the facts.
Not sure if you're trolling, but the magnetic poles move constantly. Daily, even. What we consider "magnetic north" can move in a loop as wide as 50 miles. In fact, about 800,000 years ago the poles were switched around.
.........which we why we have the ditty, west is best (+), east is least (-) as every private pilot and student should know. There is more than one North just like there are more than one speed (airspeed, ground speed, IAS etc.)
I'm not a flyer, can you elaborate on the "West is best"?
It's a memory aid for ADDING the variation (if it's so many degrees west, eg. 7*W) to a TRUE heading or track to get the MAGNETIC heading/track. For easterly variation (5*E), you subtract the variation from true to get magnetic.
The point being is that measuring on any map whether aeronautical or marine, the lines of longitude are aligned with TRUE north, but you fly/sail via the magnetic compass or compass system in your aircraft or boat. So, to summarize, you measure true from your chart but use magnetic when you operate.
The rhyme east is least, west is best is just an easy was to recall whether you add or subtract.
The point being is that measuring on any map whether aeronautical or marine, the lines of longitude are aligned with TRUE north, but you fly/sail via the magnetic compass or compass system in your aircraft or boat. So, to summarize, you measure true from your chart but use magnetic when you operate.
The rhyme east is least, west is best is just an easy was to recall whether you add or subtract.