How to use your watch to point to the sun to determine direction

Method 1: Place the watch flat so that the hour is aimed at the sun, and the bisector between the hour hand and the angle between 12 o'clock on the watch dial (less than 180 degrees) points to the direction of the south.

Method 2: The watch recognizes the direction mantra "The hours are folded in half to the sun, 12 refers to the north", divide the time you are in by 2, and then align the obtained quotient with the sun, and the direction pointed by 12 on the dial is the north. For example, at 8 a.m., divide by 2 quotients to 4, and align the 4 on the dial with the sun, and 12 points to the north.

If it is afternoon, it should be calculated according to the prescribed 24-hour timekeeping method, such as 2:00 p.m., then divide 14 by 2 quotient for 7, and aim the dial 7 at the sun, and the direction pointed by 12 is north.

The principle of the watch judging the direction.

The earth rotates 360 degrees in 24 hours and 15 degrees in an hour, and the hour hand of a watch always rotates twice as fast as the sun. At 6 o'clock in the morning, the sun is in the east, and the shadow points to the west, at this time, the hour hand on the watch points to the sun, and the "12" on the dial points to the west, if the dial rotates 90 degrees, it is half folded at 6 o'clock, so that the "3" on the dial is facing the sun, and the "12" is pointing to the north; At 12 noon, the sun is in the south, and the 12 is split in half, so that the "6" on the dial is facing the sun, and the "12" still refers to the north.

Precautions for judging the direction of the watch.

1.The above method is only suitable for use north of the Tropic of Capricorn, if it is south of the Tropic of Capricorn, aim the direction of the sun at 12 o'clock, and the hour hand and the ** at 12 o'clock point to the north.

2.Pay attention to local time and regional time (Beijing time): "12 o'clock is the time when the sun is due south.

12:00 here refers to local time, and our usual watch displays Beijing time, Beijing time uses 120 degrees east longitude, and Shanghai's longitude is about 121 degrees east longitude, which has no effect on our general judgment direction in Shanghai. However, if the gap is too large, it should be converted to the time of the district (preferably when the place), such as the longitude of Urumqi, Xinjiang is 87 ° 37 'E, and the difference between Beijing time is more than 2 hours, and the error is too large with Beijing time, the correct way is to first set back the watch time by 2 hours, and then measure the direction according to the above method.

3.When determining direction, the watch should be flat.

4.Due to the rotation of the earth and the intersection of the yellow and the red angle: in the case of Shanghai:

Sunrise is around 5:00 in the summer and 7:00 in the winter, so this method is at 8:00 in the morning

It is more accurate between 00 and 4:00 p.m., and the error is larger at other times.

Normally, the sun is in the east at 6 a.m., south at 12 noon, and west at 18 p.m. In the field, as long as there is a watch and there is the sun during the day, you can take the watch off and put it on the palm of your hand, and align the scale of the watch with the sun after the time is halved, and dial 12 refers to the north. For example:

It was 14 o'clock and you had to look for directions, and the time was halved to 7 o'clock. This should be pointed to the sun on the dial with the scale 7 on the dial, and 12 on the dial refers to the north. To be more precise, you can use a thin, straight needle or twig to stand on the point where the hour is halved and slowly turn the clock so that the shadow of the needle passes through the center of the dial.

At this time, the center of the dial and the 12-scale extension direction is north.

Time is counted in 24 hours. If you divide the current time by 2 and the hour hand of the time is in the direction of the sun, then the direction of 12 o'clock on the dial is north.

For example, if the current time is 16 o'clock, then the result of the division is 8 o'clock. If the 8 o'clock clock hand is aligned with the direction of the sun, then the 12 o'clock section is the north.

Alternatively, for a watch with hands, hold the watch flat with your hand and the dial up, turn the watch so that the hour hand on the watch box points to the sun. At this time, the hour hand of the watch forms an angle with the 12 o'clock on the dial, and the extension of the bisector of this angle is south.

It's a great trick, but first you need to have a watch with hands.

First, the measurement method of mechanical watches.

In outdoor activities, if the compass is lost or out of order, do not panic, if the weather is sunny and you wear a mechanical watch, take off the watch and then place the watch water cherry hole flat, according to the following formula for direction identification, "the hour hand folds half a pair of suns, twelve refers to the north" such as: at 10 o'clock in the morning, the Arabic numeral 5 on the watch dial is aimed at the sun, then the direction of the Arabic numeral 12 points on the watch dial is the north.

1. Place the watch flat, the hour hand points out the direction of the sun's rays, and the bisector line between the hour hand and the middle acute angle of 12 o'clock refers to the south or north. For example, in the southern hemisphere, the direction of this dividing line is due north; In the Northern Hemisphere, the direction of the dividing line is due south.

2. If the area is implementing daylight saving time, the watch should be slowed down by one hour before proceeding.

3. If the watch of the person in distress has been damaged or the time is not accurate, the time can be determined with the compass first. First, measure the azimuth of the sun, divide the number of angles of the sun for 1 hour by 15 and add 1, and the resulting value is the local time.

Divide the time you are in by 2, find the corresponding position of the quotient on the dial, and point this number at the sun, which is the direction of the "12" point on the dial. For example, at 10 a.m., divide by 2, the quotient is 5. Align the "5" on the dial with the sun, and the "12" will be north.

Keep in mind, however, that if it's in the afternoon, it should be counted as a 24-hour timepiece, and if it's 4 p.m., it's 16 p.m.

Once the north is determined, the other directions are clear at a glance, and in this way the accuracy of the compass is no less than that of the compass.

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If you don't have a compass, how can you tell the direction by the sun and your watch?

Principle: 0 o'clock local time is due north, the sun rotates one week, the watch hour hand turns 2 times, and the watch time is divided by 2, which is the direction of the sun.

Operation: The watch is laid flat, pointing to the sun at half of local time, and north at 12 o'clock.

Example: Take 14 o'clock in the afternoon as an example, 14 2 = 7, and the 7 o'clock position is aligned with the sun, and the 12 o'clock position points to the north.

1 .Place the watch horizontally, at 10 o'clock in the morning, the Arabic numeral 5 on the dial of the watch is aimed at the sun, then the direction of the Arabic numeral 12 o'clock on the dial of the watch is the north dust square.

2. The time is counted in 24 hours, divide the current time by 2, and the position of the hour hand of the time is facing the direction of the sun, so the direction pointed by the 12 o'clock on the dial is north.

3. Put the watch on the ground, when the sun shines, judging by the time of the shadow and the watch, the sun basically rises in the east and sets in the west, so when facing the north, the shadow should be on the right in the morning and on the left in the afternoon.

1 .Place the watch horizontally, at 10 a.m., align the Arabic numeral 5 on the watch dial with the sun, and bury the chain in the direction of the Arabic numeral 12 o'clock on the watch dial is north.

2. The time is counted in 24 hours, divide the current time by 2, and the position of the hour hand of the time is facing the direction of the sun, so the direction pointed at 12 o'clock on the dial is the north canopy base square.

3. Put the watch on the ground, when the sun shines over the front, judging according to the time of the shadow and the watch, the sun basically rises in the east and sets in the west on the earth, so when facing the north, the shadow should be on the right in the morning and on the left in the afternoon.

The use of a mechanical watch and the sun to determine the direction, ie"The hour is half a pair of suns, and 12 refers to the north"Generally, between 9 a.m. and 4 p.m., you can quickly identify the direction, with half of the time Cong Tong pointed to the direction to the sun, 12 hours is the north, such as the time of 14:40 in the afternoon, half of which is 7:20, the time is directed to the sun, then 12 refers to the old Zheng Lu is the north, or the watch is flat, the hour hand points to the sun, and the reverse extension direction of the hour hand and the 12 hour bisector is the north; Or put a watch, put a small stick vertically on the watch** and turn the watch, so that the shadow of the small stick coincides with the hour hand, and the bisector between the hour hand and the 12 hours is the north.

It must be noted that: (1) when determining the direction, the watch should be flat; (2) It is not suitable to be used around noon in areas between 20°30 north latitude and south latitude, that is, the meridian of standard time shall prevail, add 1 hour for every 15° to the east, and subtract 1 hour from 15° to the west. In the Northern Hemisphere, the time is pointed at the Sun, and the hour hand is bisector with the 12 o'clock scale pointing due north.