cheers

Ditto

its what i do. the problem is when taking measurement in the field, like for finding your position. each measurement you get is wrong by 20degrees?

@@Francois_Dupont not sure what you mean. If you're going from compass to map you would do the opposite... in the case of my example you would then add 20 degrees to your bearing when plotting on the map.

I think he does the same but he was making this video to explain how to use a fixed declination scale. I would definitely just add or subtract it to the bearing but I've always wanted to know how to use a fixed scale.

Yes. Right on

I was taught to add or subtract the declination using the mnemonic "Declination East, compass least. Declination West, compass best".

That is awesome!

Glad it was helpful!

Glad it was helpful!

thanks that what I was trying for

Cheers

Glad it was helpful!

Glad it was helpful!

yes

Glad it was helpful!

Cheers

Thank you very much!

Sorry West!!!

no worries

Glad it was helpful!

The rhyme works for negative and positive declination. Try it. It doesn’t matter.

@@verysurvival Twice as good then.

take care Steve!

Glad it was helpful!

Yes

@@verysurvival Thanks.

Sounds like it has been adjusted for declination. There should be a screw on it somewhere to adjust

Buy NH , I’ve spoken to manufacturers and they have told me that NH compasses or SH compasses are better than global.

Yeah. I understand the concept but i don't think it will become useable info until it's used in the field. I buy adjustable dec. compasses now but it's good to know how fixed scale compasses handle it.

USGS maps. That stands for United States Geological Survey, I believe. Probably get any scale you want; for examples 1:50,000/1:24,000/7.5 minute is 1:15,000 I think, or maybe even greater/closer detail. I am Canadian so double check this info!! Pretty sure I'm correct, but this is a start for you. Seriously, I'd highly suggest USGS topographic maps, because they show contoured elevations, rivers, lakes, trails, terrain features, buildings, bridges, power lines, railways and every other detail you can imagine. Pay very serious attention to the date ANY map was surveyed, because declination/Magnetic North changes over time. You get into an old map and use the provided declination angle from 1988 or something you will be off your destination target, possibly by a lot. Make sure you find the date of any map you get (that's step #1), and make the error correction/do the math for the correct present declination in your area, or check the internet for your local declination. Hope this is a help (and check out caltopo.com to print your own topo maps which I think may use/provide USGS maps).

USGS 1:24000 TOPO maps are great. However if you hike big, you'll probably need two maps.

generally speaking it will mess it up, there are magnets in the engine parts and in the speakers etc not to mention the steel it is made of, all this will mess it up . You can test it stand several meters from the car and see where it points, and then get in the car. you might get lucky and find a spot in the car that it works.

@@verysurvival ok thanks i guess i'll just try and use the app on my phone hopefully it works somewhat

Not really because you always have to move it. But if you mean can you remember the offset and adjust every time you take a reading then yes you can. That works great

@@verysurvival I kind of mean if you mark your offset with a piece of tape or something every time you take a reading that would become your new mark to put in the doghouse. Would that work?

Because after step 2 of the Silva 123 method you don’t use a map. The slab of wood is just to help see the markings on the compass. So I’m showing how to adjust for declination after step 2 and it doesn’t use a map at that stage

@@verysurvival Thanks for the quick reply. I am trying to orientate a map with a fixed scale compass and am having or sorts of problems with accuracy in that the map simply does not to seem to be laying in the correct direction.

Place the compass on the map with the long edge parallel to the vertical map lines and the red arrow in the rotating housing is pointing to the top of the map parallel to the vertical map lines. Now keep map and compass together and move them so that the magnetic needle points to the magnetic declination in your area. Now the map is aligned

@@verysurvival Thanks

You're not slow, this whole video should have been an overhead shot at a map/compass. diddling with something in his palm we can not see is useless.

mind blown

yes but you have to adj for the needle dipping due to the curvature of the flat earth.

Declination can be ignored if you wash the compass with bleach

could be worse. while 0 bama was in office he sucked so hard we had to make a 90 degree compensation.

🤣 you guys are hilarious