wikiHow to Find True North Without a Compasswikihow.com /Find-True-North-Without-a-Compass

Which way is north? Whether you're lost in the woods or you're trying to install a sundial in your yard, you're boundto want to find true north from time to time, and chances are when the time comes you won't have a compass.What's more, even if you do have a compass, it will point to magnetic north, which changes with your location in theworld

1The Shadow-Tip Method

1. Place a stick upright in the ground so that you can see its shadow. Alternatively, you can use theshadow of a fixed object. Nearly any object will work, but the taller the object is, the easier it will be to see themovement of its shadow, and the narrower the tip of the object is, the more accurate the reading will be. Makesure the shadow is cast on a level, brush-free spot.

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2. Mark the tip of the shadow with a small object, such as a pebble, or a distinct scratch in the ground.Try to make the mark as small as possible so as to pinpoint the shadow's tip, but make sure you can identifythe mark later.

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3. Wait 10-15 minutes. The shadow tip will move mostly from west to east in a curved line.

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4. Mark the new position of the shadow's tip with another small object or scratch. It will likely move only ashort distance.

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5. Draw a straight line in the ground between the two marks. This is an approximate east-west line.

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6. Stand with the first mark (west) on your left, and the other (east) on your right. You are now facingmostly toward true north, regardless of where you are in the world. The illustration shows that the sun andmarker at Points 1 is what is happening for Step 2. At Points 2, it shows what is happening for Step 4. Thismethod is based on the fact that the sun moves across the sky from East to West.

2Using the Stars: Northern Hemisphere

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1. Locate the North Star (Polaris) in the night sky. The North Star is the last star in the handle of the LittleDipper constellation. If you have trouble finding it, find the Big Dipper. The two lowest stars in the Big Dipper(the outermost stars of the cup of the dipper) form a straight line that "points" to the North Star. You may alsofind the constellation Cassiopeia, which is always opposite the Big Dipper. The North Star is located aboutmidway between the central star of Cassiopeia and the Big Dipper (see figure).

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2. Draw an imaginary line straight down from the North Star to the ground. This direction is true north, andif you can find a landmark in the distance at this point, you can use it to guide yourself.

3Using the Stars: Southern Hemisphere

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1. Find the Southern Cross constellation. In the southern hemisphere, the North Star is not visible, and nosingle star always indicates north or south, but you can use the Southern Cross and the pointer stars as yourguide. The Southern Cross constellation is formed by five stars, and the four brightest stars form a cross thatis angled to one side.

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2. Identify the two stars that make up the long axis of the cross. These stars form a line which "points" toan imaginary point in the sky which is above the South Pole. Follow the imaginary line down from the twostars five times the distance between them.

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3. Draw an imaginary line from this point to the ground, and try to identify a corresponding landmark tosteer by. Since this is true south, true north is directly opposite it (behind you as you are looking at the point).

4Using the Stars: Equator

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1. The Orion Constellation is visible from both hemispheres depending on the time of the year. It is apermanent feature on the equator.

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2. Look for Orion's Belt. Orion has several prominent stars. The 'belt' (3 stars in a row) runs from East to West.Look for that, it has a 'sword' attached to it.

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3. Project a line From the sword through the middle star of the Belt. That is the general direction of North.

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4. Orion lays across the Equator: the Belt rises & sets at east & West

5Alternate Shadow-Tip Method for Increased Accuracy

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1. Set up a stick as perpendicular to the level ground as possible and mark the first shadow-tip asabove. For this method, take your first reading in the morning, at least an hour or so before midday.

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2. Find an object or length of string, etc., exactly the same length as the shadow.

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3. Continue taking measurements of the shadow's length every 10-20 minutes. The shadow will shrinkbefore midday and will grow after midday.

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4. Measure the shadow length as the shadow grows. Use the string or object you used to measure thelength of the initial shadow. When the shadow grows to exactly the same length as the string (and henceexactly the same length as your first measurement), mark the spot.

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5. Draw a line connecting the first and second marks as above. Once again, this is your east-west line, andif you stand with the first mark on your left and the second on your right, you will be facing true north.

6Watch Method: Northern Hemisphere

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1. Find an analog watch (the kind with hour and minute hands) that is set accurately. Place it on a levelsurface, such as the ground, or hold it horizontal in your hand.

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2. Point the hour hand at the sun.

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3. Bisect (that is, find the centre point of) the angle between the hour hand and the twelve o'clock mark(the number 12 on the watch). The centre of the angle between the hour hand and twelve o'clock mark isthe north-south line. If you don't know which way is north and which south, just remember that no matterwhere you are, the sun rises in the east and sets in the west. In the northern hemisphere the sun is due southat midday. If your watch is set to daylight saving time bisect the angle between the hour hand and the oneo'clock mark instead.

7Watch Method: Southern Hemisphere

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1. Use an analogue watch as above, and point the twelve o'clock mark (the number 12) of the watchtoward the sun. If your watch is set to daylight saving time, point the one o'clock mark toward the sun.

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2. Bisect the angle between the twelve o'clock mark (or one o'clock mark if using daylight saving time)and the hour hand to find the north-south line. If you're unsure which way is north, remember that the sunrises in the east and sets in the west no matter where you are. In the southern hemisphere, however, the sunis due north at midday.

8Estimating the Sun's Path

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1. Understand the path that the sun takes. Remember that the sun rises in the general east and sets in thegeneral west. In between, the sun will sweep out an arc to the south in the northern hemisphere, and to thenorth in the southern hemisphere (always towards the equator). This means that in the very early morning(shortly after sunrise), the sun will be generally east, while very late in the evening (shortly before sunset), itwill be sun will be generally west.

The path of the sun can vary quite a bit depending on the season, especially far from the equator. Forinstance, in the summer, sunrise and sunset will tend to be further from the equator (more northerly inthe northern hemisphere, and more southerly in the southern hemisphere), while in the winter, they willtend to be closer to the equator. Only one the spring and fall equinoxes does the sun rise due-east andset due-west.

For precautionary measures, familiar with the path of the sun for your area or the area where you willbe going before you are in a situation where you have to know it. A helpful and free web tool isavailable at http://www.sunearthtools.com/dp/tools/pos_sun.php. In particular, try to learn the shape ofthe path at the two solstices, and the approximate time of sunrise and sunset for these two paths.Knowing this information ahead of time can help you estimate the path for the current day.

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2. Find north based on the direction of the sun. If you determine that the sun is in the east (early in themorning), then north will be roughly a quarter turn counterclockwise (for instance, if you're facing the sun,then you would turn to the left). If the sun is in the west, then north is roughly a quarter turn clockwise. If thesun is in south, then north is directly opposite it.

Around 12 noon (depending on day light savings time and your position within the timezone), the sunwill be pointed due south in the northern hemisphere, and due north in the southern hemisphere.

Community Q&A

How do I find the north and south poles of a magnet using another magnet?wikiHow ContributorAssuming that you have two unknown magnets, but you know which direction is north, suspend a magnetfrom a string or float it in a bowl of water. Mark the end that points north with an "N" and the other end with an"S". Take that magnet and move it near the second magnet. The end of the second magnet that is attracted tothe "N" end is the south pole of the second magnet. Mark it with an "S" and the other end with an "N".Not Helpful 1 Helpful 11

How can I find true north if it is raining?wikiHow ContributorSometimes a little sunlight gets past the clouds. If you cant see the shadow, try looking for a place wheremore light gets through. Still cant find it? Then just wait for the rain to stop.Not Helpful 26 Helpful 32

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If the center star of Orion's belt shows North then why is East on the left? Whenever I face North, West isalways on my left.wikiHow ContributorI presume you're in the northern hemisphere. Orion is on the equator. In order to see Orion high in the sky ,you have to be looking south. Therefore, east will be on your left and west on your right. North is in back ofyou. The center star does not "show north" all by itself. "Hanging down" from the center star of Orion's belt ishis sword, made up of what appears to be three stars. There are actually several stars involved, and a galaxy.You can draw a straight line through the sword, the middle star of the belt, his head (Meissa), and the NorthStar.Not Helpful 6 Helpful 8

How do I find direction without a compass, magnet or the sun?wikiHow Contributorif you are lost in the middle of the forest or jungle, look for a spider web where it has a spider on it. Spidersspin their webs to face true south, so true north would be the opposite of what the web is facing.Not Helpful 8 Helpful 6

Is this true north or magnetic north?wikiHow ContributorIn the above article, the subject is finding true north. Polaris is positioned right over the physical North Pole ofEarth. Magnetic north can be several degrees removed from that pole in several different directions,depending upon where you are on Earth (longitude).Not Helpful 5 Helpful 3

Unanswered Questions

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Tips

When trying to locate the North Star it is important to remember that, despite popular belief, the North Star is28/29

not the brightest star in the sky. The only remarkable thing about it is that it is the only star in the sky thatdoes not move.

These methods may require practice to perfect, so it's a good idea to try them a couple times when you cancheck your readings. That way, you'll be able to rely on them if you're in a survival situation.

Halfway between the 12 (use the 1 instead if you're set to Daylight Savings Time ) and the hour hand is theNorth-South line. At Noon/midday, in the Northern Hemisphere, the sun is due-South; in the SouthernHemisphere, it's due-North.

If using the shadow method, the longer you wait the more the shadow moves and the more accurate itbecomes.

In mountain regions with snowfalls, you may also get a hint on the general west/north by noticing the sides ofthe mountains having more snow. Those sides with more snow are generally facing North or West.

Warnings

The North Star becomes higher in the sky the further north you travel, and it is not useful about 70° Nlatitude.

The watch method is not recommended in lower latitudes, particularly below 20° in either hemisphere.

The shadow-tip methods are not recommended in the polar regions, which are latitudes above 60° in eitherhemisphere.

Sources and Citations

U.S. Army Survival Manual 21-76 direction finding

Further explanation of field-expedient directional methods

- The difference between true north and magnetic north

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