Concrete Markers (Inserts?)(Inlays?)

   / Concrete Markers (Inserts?)(Inlays?)
  • Thread Starter
#11  
Thanks to all.

The item I want is a Compass Rose.

Once I got over the sticker shock of the 36" bronze one ($1500-$3600) depending on things I didn't ask, I think the $94, 9" one is going to be fine.
 
   / Concrete Markers (Inserts?)(Inlays?) #14  
If you align to magnetic north, you need to make it pivot. :)

northpole.jpg
 
   / Concrete Markers (Inserts?)(Inlays?)
  • Thread Starter
#15  
Now are you going to set it for true north or magnetic?

I use true north for all all the compass bearings I make for my own use. It will be true north.

Unfortunately, the rural Southern Oregon area DW and I retired to, is full of mouth-breathing, knuckle-dragging Cave Dwellers in the area of land navigation. In most other areas they are fine people and wonderful friends, but if the topic comes up, there is no one else in the county who cares about the difference, or even understands that there might be some practical significance.

In this local area declination is 17 degrees. The people I hunt with will plan 2 to 3 mile hunts on a map and then have no idea why they are never even close to their end point at the finish. I have told them about true vs. magnetic north many times, but they never seem to correlate the difference with the paper map using true north and them walking a bearing which is 17 degrees different than they think.

When I first moved here, nearly 10 years ago the satellite TV people told me the compass bearing their dish needed to look, and I cut down a large tree so it would have a clear view of the sky at that bearing. I used true north. The installer came and used magnetic north to position the dish, which meant that the tree could have remained. Neither he, nor the main office saw any inconsistency with a satellite TV company using magnetic north.
 
   / Concrete Markers (Inserts?)(Inlays?) #16  
My Dad put up his own 9' dish back in the 80's without a compass--he sighted through the pivot points to the north star, and never had an issue with the alignment (lightning frying receivers on the other hand...)
 
   / Concrete Markers (Inserts?)(Inlays?) #19  
I use true north for all all the compass bearings I make for my own use. It will be true north.

Unfortunately, the rural Southern Oregon area DW and I retired to, is full of mouth-breathing, knuckle-dragging Cave Dwellers in the area of land navigation. In most other areas they are fine people and wonderful friends, but if the topic comes up, there is no one else in the county who cares about the difference, or even understands that there might be some practical significance.

In this local area declination is 17 degrees. The people I hunt with will plan 2 to 3 mile hunts on a map and then have no idea why they are never even close to their end point at the finish. I have told them about true vs. magnetic north many times, but they never seem to correlate the difference with the paper map using true north and them walking a bearing which is 17 degrees different than they think.

When I first moved here, nearly 10 years ago the satellite TV people told me the compass bearing their dish needed to look, and I cut down a large tree so it would have a clear view of the sky at that bearing. I used true north. The installer came and used magnetic north to position the dish, which meant that the tree could have remained. Neither he, nor the main office saw any inconsistency with a satellite TV company using magnetic north.

T V Makes Dull Company or True +/- Variation = Magnetic + Delineation = Course
 

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