Navigation Gear You Have to Have

Submitted: Tuesday, Jun 06, 2006 at 08:31
ThreadID: 34665 Views:1772 Replies:2 FollowUps:6
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Check this out on ebay:

Digital Compass

"Resolution - 1 degree
Accuracy +/- 5 degrees
Programmable declination angle"

+/- 5º !!!

That means every kilometre you travel you could be about 90 metres either side of a direct line which doesn't sound like much but it adds up pretty quickly!

I must get one so that I can get really lost.

Pete
Any mug can be uncomfortable out bush

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Reply By: signman - Tuesday, Jun 06, 2006 at 09:12

Tuesday, Jun 06, 2006 at 09:12
There are digital electronic compasses at Aldi this week for $20..
AnswerID: 176966

Follow Up By: Mr Fawlty - Tuesday, Jun 06, 2006 at 13:55

Tuesday, Jun 06, 2006 at 13:55
Yeah, they used to be $29.95 and I have one but it is not the most accurate compass out there. +/- 5 degrees is about right for a flux gate compass. More reliable though than magnetic that can be way off due to diferences in the earths magnetic field and unseen magnetic items around you ie a rocky outcrop that may have some ferrous content and if we are talking central Australia it's Iron that gives the magnificent colour to the rocks...
Good stuff for a trivia night: Why did the early explorers wander all around the place in Central Oz? Because though they were following their compass headings their headings were flawed due to "ferrous presences".
I really do have to find something else to do don't I?
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Follow Up By: cokeaddict - Tuesday, Jun 06, 2006 at 18:27

Tuesday, Jun 06, 2006 at 18:27
fairdinkum Fawlty.....ur a cracker mate !!!
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Follow Up By: Kiwi Kia - Tuesday, Jun 06, 2006 at 21:00

Tuesday, Jun 06, 2006 at 21:00
I think your theory is a bit fawlty Mr Fawlty !

A flux gate compass works on the earths magnetic field the same as all magnetic compasses ie. non - gps or gyro stabilised DI's.

The only difference between a flux gate compass and the old 'boy scout' handheld is that the pick up needle is mounted remote from the read out.

Any local ferrous outcrop will effect the fluxgate compass the same as it will any other magnetic compass.

A fluxgate compass is designed to have the pickup mounted where it is remote from the magnetic influence of electrical equipment eg. radio, generator, alternator, current carrying cables etc.
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Follow Up By: Mr Fawlty - Wednesday, Jun 07, 2006 at 19:41

Wednesday, Jun 07, 2006 at 19:41
Yes by jove you are right...so by that rationale the magnetic needle compass will be more accurate. ( Basil hoiks his Aldi Digital into the bin)
Fortunatley I'm not allowed to get myself into a situation that would allow me to use a compass, unless of the circle drawing type. I find it so much simpler to use a sextant & dead reconing, although with GPS prices dropping I'll soon have no excuse to not own one...
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Reply By: Muzzgit (WA) - Tuesday, Jun 06, 2006 at 23:15

Tuesday, Jun 06, 2006 at 23:15
Anyone who wants to have fun with a compass, sit in the drivers seat of a GU patrol and see if you can pick which way is north. chances are you will be more accurate than the compass!!!
AnswerID: 177129

Follow Up By: Member - Craig D (SA) - Wednesday, Jun 07, 2006 at 15:21

Wednesday, Jun 07, 2006 at 15:21
Really? I have a magnetic compass in my GU and I can tell you it's accurate (swung and adjusted).
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Follow Up By: Muzzgit (WA) - Wednesday, Jun 07, 2006 at 21:50

Wednesday, Jun 07, 2006 at 21:50
Mine swings around when it's near the steering wheel. Maybe it's the SRS airbag?
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