compass use near vehicle
Submitted: Monday, Jul 28, 2003 at 23:47
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hilux
I was out recently and was using a compass reading from a map resting on the bonet of my Hilux, and realised that there was something wrong on walking about the ute I got s different reading abouit every 2/3 feet the compass was going mad. Has anyone else expirienced this ?? as I would guarantee if you were LOST dont put a compass anywhere near your vehicle while trying to take a reading.
ps. all electrics were off.
Reply By: Member - Toonfish - Monday, Jul 28, 2003 at 23:59
Monday, Jul 28, 2003 at 23:59
from memory magnetic compasses can be i mil out on a fence line 3 metres out on a vehicle and up to 10 mil out on a antenna or lage metal object .
i have many old military files on this subject. so the rule of thumb is walk 1 metre from fence line 3 metres from vehicle and so on.
Remember it is a magnetic compass.
Now you brought back some painful military navigational lessons memories
lol at some of the obvious mistakes you make as a rookie.
1999 NISSAN NAVARA DUALCAB
DIESEL 3.2 & SPRINGY CARLTON TOY
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Follow Up By: Brian - Tuesday, Jul 29, 2003 at 10:47
Tuesday, Jul 29, 2003 at 10:47
Carring a Rifle effected the compass too!!!
Learnt that the hard way!!!!!
Brian
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Follow Up By: Member - George (WA) - Tuesday, Jul 29, 2003 at 12:10
Tuesday, Jul 29, 2003 at 12:10
You are all correct when you refer to ferrous metals but it does not apply to non-ferrous metals.
I believe that Range Rover (a dirty word) has an aluminium body
CheersKing Edward River,
Mitchell Plateau
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Follow Up By: Member - Shawn - Tuesday, Jul 29, 2003 at 14:05
Tuesday, Jul 29, 2003 at 14:05
Guys, good to find out who the old salts are.
Military Navigation has not changed. When shooting bearings do it away from any metal objects (that includes any vehicle) or any thing that involves electricity, and remember that a 1mil (0.056 degrees) error over a kilometre is a 1 metre error on the ground, that can work out to a pretty big error = LOST
CheersKeep your powder dry
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Follow Up By: Brian - Tuesday, Jul 29, 2003 at 14:36
Tuesday, Jul 29, 2003 at 14:36
Yes the Range/Land Rover are alloy body but steel pillars and chassis.. etc enough to interfeer with the compass
Brian
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Reply By: Bruce QLD - Tuesday, Jul 29, 2003 at 04:12
Tuesday, Jul 29, 2003 at 04:12
Hilux
The first lesson i was taught with map reading and compasses this was when i was knee high to a grasshopper.
where do you spread the map out the bonet is a nice flat surface but if using a compass wrong. utilise this equipment
well away from metal objects.
plus basic science taught me the reaction of compasses and metal
Follow your bullbar you never know where it will take you!!
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Follow Up By: Time - Tuesday, Jul 29, 2003 at 07:37
Tuesday, Jul 29, 2003 at 07:37
Me 2. First rule was get away from metal, find north with compass and orient the map that way (mag north of course). Bit different now with the GPS, just follow the arrow!
Cheers
Buggerlux
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Reply By: Member - Fred - Tuesday, Jul 29, 2003 at 14:05
Tuesday, Jul 29, 2003 at 14:05
Also need to look out for belt buckles
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Follow Up By: Bruce QLD - Tuesday, Jul 29, 2003 at 15:13
Tuesday, Jul 29, 2003 at 15:13
forgot about them but now youmention it i have been reminded Follow your bullbar you never know where it will take you!!
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Reply By: Member - Alpaca (SA) - Tuesday, Jul 29, 2003 at 21:27
Tuesday, Jul 29, 2003 at 21:27
I always keep a compass in the 4X4 but hardly use it. Generally speaking, if you know where North is, the rest follow on. To find North,PROVIDING you can see the sun, point the 12 on your watch towards the sun and North is approximately half way between 12 and the hour of the day. e.g. at say 4.15pm North is about 2o'clock. You can even do it inside the car. I do this if I wish to
check the track I'm on is going in generally the right direction.
Happy TravelsAlpaca
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Follow Up By: Member - Shawn - Wednesday, Jul 30, 2003 at 16:18
Wednesday, Jul 30, 2003 at 16:18
Easy for us, how many
young poepole can't read anolog clocks, quite a few I suspectKeep your powder dry
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Reply By: al - Tuesday, Jul 29, 2003 at 22:22
Tuesday, Jul 29, 2003 at 22:22
Tried the watch method a few years ago in an area of magnetic
rock near Mt Joe I think, and did not realise that the wathch had stopped due to a dead battery. This resulted in lunch being about 2 hour later and us taking a different route as I thought we had plenty of time. We also missed our meal at the pub as we were too late back. So
check the time before you calculate
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