where to download garmin mapsource software

Next, holding the watch in place, imagine an angle formed by the hour hand and a line from the 12 o'clock position to the center of the watch. First, make sure the watch displays the correct time. If it isn't noon, and you want to find your directions during daylight, an analogue watch with minute and hour hands can serve as a substitute compass. The opposite is true in the Southern Hemisphere. Walking with the sun at your back means you're heading north. That means when you're facing the sun at noon, walking directly toward it will take you south. At noon, it looms in the middle of the horizon and directly south. In the Northern Hemisphere, the sun always rises in the east and sets in the west. But to use this solar guide, you'll need to remember a few important things. The movement of the sun can illuminate your way true north. If you're lost during the day somewhere without a map, compass or GPS handy, the best method to find your direction is to look up. You can use your watch to find true north. Next, we'll explore ways to find true north using our celestial compass, the sun. The orienting arrow and direction of travel arrow indicate true north.

Then, hold out your compass and turn your body until the needle points to your declination. You can also accomplish this by aligning the orienting arrow and the direction of travel arrow. When the needle and orienting arrow line up, the direction of travel arrow on the base will point true north. Otherwise, you can use the bezel ring on a compass to set the magnetic declination by turning the ring until the orienting arrow points to your declination value. Some compasses allow you to manually adjust the needle to compensate for the declination. If you are east of the line, it will be negative, meaning you turn the ring clockwise west of it is positive, meaning you turn the ring counterclockwise. First, be sure to know whether the declination number is positive or negative, which is determined by whether you are east or west of the agonic line. There are a few options for adjusting your compass to true north. Why go to all this trouble? Even a 1 degree difference in true north and magnetic north can land you up to 920 feet (280 meters) off-course. That information will either be listed in your map's legend or you can find it online at government websites, such as the National Centers for Environmental Information (formerly the National Geophysical Data Center).

To find true north, you need to know your local declination value, or the angle difference between true north and magnetic north, discussed earlier. Given these irregularities, how will you ever reach the North Pole or a true north destination? Read on to find out how you can do it - any time of day and with human-made and natural navigation tools. North America has several - for example, one currently runs through the panhandle of Florida up to the Great Lakes and into the Arctic Ocean. Geographical lines do exist where true north and magnetic north are aligned, and these are called agonic lines. For instance, if you hold out a compass in Auckland, New Zealand, magnetic north will be about 20 degrees east of true north, whereas the declination in Atlanta, Georgia, is 6 degrees west of true north. Magnetic declinations vary from place to place, depending on the intensity of Earth's magnetic fields. That difference is called the magnetic declination and is measured by the angle between true north and magnetic north when plotted on a map. Since Earth's magnet isn't perfectly aligned with the geographical poles, there is a difference between true north on a map and the north indicated by your compass. A compass needle is magnetized and freely suspended to allow that horizontal force to pull it toward magnetic north as well. The force of that magnetic field has a horizontal component in the direction of magnetic north. Fluid iron in the planet's core acts like a huge bar magnet, creating a relatively weak magnetic field. Compasses, on the other hand, direct you to magnetic north, a point in the arctic regions of Canada that continually shifts location based on the activity of Earth's magnetic fields. Each line of longitude begins and ends at the Earth's poles and represents direct north and south travel.

True north is a geographical direction represented on maps and globes by lines of longitude. If you want to get from a point at the bottom of a map to one at the top, you need to head true north. To get to the North Pole, or true north, just following your compass needle won't work. So instead, you pull out your compass, watch the needle swing northward and plot a path, right? Wrong. Suppose you decide to make a trek to the North Pole. Cartography conventions help people make sense of a map immediately, which makes it easier to find their way.

Where to download garmin mapsource software