Compass dip - questions for the southern Hemisphere people.
 

Schoonertrash wrote:

Well . . it was clear to me?????

Massive iron deposis in Canada have nothing at all
to do with compass dip. It's only that the earths
surface is not parallel to the lines of the Earths
magnetic force. Closer to the poles, the magnetism
of the Earth pulls either the north or south pole
of the compass down more. Close to the equator,
the force is almost parallel.

You may be thinking about variation, which is
definitely affected by local magnetic anomalies
like massive iron deposits.

BTW in a couple of "around the world" sailing
books, the skipper/author talks about either
correcting for compass dip or switching compasses.
One of them is 'My Old Man & The Sea' which is a
good read all in itself; but they planned to take
three compasses with them (on a 25' boat no less)
and in the last minute rush, forgot. So they
disassembled their compass and remounted the
magnets to correct for dip. Interesting book, I
gave my father a copy.....

Fresh Breezes- Doug King

Compass dip - questions for the southern Hemisphere people.
 

DSK wrote:

Massive iron deposis in Canada have nothing at all
to do with compass dip. It's only that the earths
surface is not parallel to the lines of the Earths
magnetic force.

100% correct.

Closer to the poles, the magnetism
of the Earth pulls either the north or south pole
of the compass down more. Close to the equator,
the force is almost parallel.

Not really, the region of zero dip wanders about 12 degrees north and
south of the equator. Check out Chart 30 for this info?


You may be thinking about variation, which is
definitely affected by local magnetic anomalies
like massive iron deposits.

Dip is also affect by anolmalies.


Cheers MC

Compass dip - questions for the southern Hemisphere people.
 

The_navigator© wrote:



DSK wrote:

Massive iron deposis in Canada have nothing at all
to do with compass dip. It's only that the earths
surface is not parallel to the lines of the Earths
magnetic force.


100% correct.

I exaggerated. It's about 50%

Cheers MC

Closer to the poles, the magnetism
of the Earth pulls either the north or south pole
of the compass down more. Close to the equator,
the force is almost parallel.


Not really, the region of zero dip wanders about 12 degrees north and
south of the equator. Check out Chart 30 for this info?


You may be thinking about variation, which is
definitely affected by local magnetic anomalies
like massive iron deposits.


Dip is also affect by anolmalies.


Cheers MC

Compass dip - questions for the southern Hemisphere people.
 

"The_navigator©" wrote in message
...
....

Closer to the poles, the magnetism
of the Earth pulls either the north or south pole
of the compass down more. Close to the equator,
the force is almost parallel.

Not really, the region of zero dip wanders about 12 degrees north and
south of the equator. Check out Chart 30 for this info?

He was refering to the Magnetic Equator.



You may be thinking about variation, which is
definitely affected by local magnetic anomalies
like massive iron deposits.

Dip is also affect by anolmalies.


Dip and variation are the same phenomenon, measured on different axis.

Compass dip - questions for the southern Hemisphere people.
 

Jeff Morris wrote:

"The_navigator©" wrote in message
...
...

Closer to the poles, the magnetism
of the Earth pulls either the north or south pole
of the compass down more. Close to the equator,
the force is almost parallel.

Not really, the region of zero dip wanders about 12 degrees north and
south of the equator. Check out Chart 30 for this info?


He was refering to the Magnetic Equator.


Not as I read it he wasn't.


You may be thinking about variation, which is
definitely affected by local magnetic anomalies
like massive iron deposits.

Dip is also affect by anolmalies.


Dip and variation are the same phenomenon, measured on different axis.

What is the phenomenon you have in mind?

Cheers MC

Compass dip - questions for the southern Hemisphere people.
 

"The_navigator©" wrote in message
...


Jeff Morris wrote:

"The_navigator©" wrote in message
...
...

Closer to the poles, the magnetism
of the Earth pulls either the north or south pole
of the compass down more. Close to the equator,
the force is almost parallel.

Not really, the region of zero dip wanders about 12 degrees north and
south of the equator. Check out Chart 30 for this info?


He was refering to the Magnetic Equator.


Not as I read it he wasn't.


It was a joke, Swifty. And besides, it all depends on how you interpret "close
to the equator." From where I am, 12 degrees N or S is pretty close.



You may be thinking about variation, which is
definitely affected by local magnetic anomalies
like massive iron deposits.

Dip is also affect by anolmalies.


Dip and variation are the same phenomenon, measured on different axis.

What is the phenomenon you have in mind?


Ah, how about The Earth's Magnetic Field? Or is there something else?

Compass dip - questions for the southern Hemisphere people.
 

What is the phenomenon you have in mind?

Jeff Morris wrote:
Ah, how about The Earth's Magnetic Field? Or is there something else?

Hey Jeff! Quit poaching my bait!

Actually, I don't particularly want to reel in the Navvie©-fish this time. Too hard
to clean and they look unsavory in the pan.

DSK

Compass dip - questions for the southern Hemisphere people.
 

I was wondering 'cos most scientist wouldn't call a magentic field a
'phenomenon' that's all. I was wondering if you were maybe thinking
about solar pressure effects on the field or something like that.

Cheers Swifty.

Jeff Morris wrote:


What is the phenomenon you have in mind?



Ah, how about The Earth's Magnetic Field? Or is there something else?

Compass dip - questions for the southern Hemisphere people.
 

Tut tut. Now I'll only give you 25% correct for your statement

"Massive iron deposis in Canada have nothing at all
to do with compass dip. It's only that the earths
surface is not parallel to the lines of the Earths
magnetic force."

Cheers MC

DSK wrote:

What is the phenomenon you have in mind?


Jeff Morris wrote:
Ah, how about The Earth's Magnetic Field? Or is there something else?


Hey Jeff! Quit poaching my bait!

Actually, I don't particularly want to reel in the Navvie©-fish this time. Too hard
to clean and they look unsavory in the pan.

DSK