Article: At noon (12:00 PM by your local standard time), use your sextant to measure the altitude of the sun. The sun's altitude at noon will vary depending on your latitude and the time of year. For example, if you were at the equator and taking your measurement during the spring or fall equinox, the sun would be exactly 90 overhead at noon. If you were at one of the poles, it would be at exactly 0 (on the horizon). To get an accurate latitude measurement, you'll need to apply the standard corrections to your reading of the sun's altitude. If your sextant has any index error (difference between a measurement taken at the horizon and 0), take it into account. Measure the height of your eye, add it to any additional elevation above sea level, and use the 1.7725' x ht (ht being height) formula to correct for dip. Finally, consult the tables in your Nautical Almanac to find the corrections for refraction, semi-diameter, and parallax. Apply the corrections as follows: Observed altitude of the sun +/- index error (+ if the difference is negative, - if it's positive) - dip - refraction + semi-diameter + parallax = true altitude of the sun Depending on the position of the sun relative to the equator, you'll need to either add or subtract the declination from your previous calculation to find your latitude. If the sun is north of the equator, add the declination. If it's to the south, subtract it.For example, if you got a measurement of 7 42.7' after subtracting the sun's altitude from 90, and it's currently April 13, the sun is north of the equator and its declination is 8 54'. Add 7 42.7' + 8 54' to get 16 36.57'. This is your latitude!
Question: What is a summary of what this article is about?
Find the sun's angle of elevation at its highest point. Make corrections for index error, dip, refraction, semi-diameter, and parallax. Add or subtract the declination of the sun to find your latitude.
Article: It's the white "F" on a blue background. If you aren't logged in, enter your email address (or phone number) and password and tap Log In. The search bar is at the top of the screen; typing a friend's name in will prompt a drop-down menu below it. If your friend has a post in your News Feed, tap their profile image to open their profile. It'll appear below the search bar. It should appear at the top of the "People" page that pops up after tapping their name. You'll find this option below your friend's profile picture and name. Doing so will remove your friend's notifications from your News Feed, though you'll still be able to view their profile if you choose to search for it. You may still see the post they liked if other people whom you haven't unfollowed like it as well. You can solve this problem by hiding the post itself (see below) or by unfollowing the people who liked it.
Question: What is a summary of what this article is about?
Open the Facebook app. Type your friend's name into the search bar. Tap your friend's name. Tap your friend's profile image. Tap Following. Tap Unfollow.
Article: If you have an iPhone or an iPad on which you're logged in with an Apple ID that you've never used to purchase an Apple Music subscription, you can try Apple Music for free for three months. Apple Music allows you to download and listen to a huge selection of songs for free. At the end of the three months, you'll need to pay for any additional months or cancel your membership. Unfortunately, this is more of a quick fix than a long-term solutionApple Music songs will be deleted from your iPhone if you cancel your subscription. Tap the Settings app icon, which resembles a grey box with gears on it. It's near the middle of the Settings page. This switch, which is near the top of the page, will turn green {"smallUrl":"https:\/\/www.wikihow.com\/images\/1\/15\/Iphoneswitchonicon1.png","bigUrl":"\/images\/thumb\/1\/15\/Iphoneswitchonicon1.png\/46px-Iphoneswitchonicon1.png","smallWidth":460,"smallHeight":300,"bigWidth":"46","bigHeight":"30","licensing":"<div class="mw-parser-output"><p>I edited this screenshot of an iPhone
<\/p><p>License: <a rel="nofollow" class="external text" href="http:\/\/en.wikipedia.org\/wiki\/Fair_use">Fair Use<\/a><br>
<\/p><\/div>"}, signifying that you've enabled Apple Music in your iPhone's Music app. If this switch is already green, Apple Music is enabled in the Music app. You'll find it below the "Show Apple Music" switch. A pop-up window will appear. It's at the bottom of the pop-up window. If you don't have this option, you cannot use Apple Music for free on your current Apple ID account. This pricing option is at the top of the menu. It's at the bottom of the screen. Scan your Touch ID fingerprint, or type in your Apple ID password, then tap Sign In. If prompted, tap the card or payment method you want to use with Apple Music. You won't be charged now, but this information will be used to pay for Apple Music in three months. If you don't have any payment information on file, tap Continue when prompted, then enter your payment information. Once you've entered your payment information, you'll just need to complete the final steps of the Apple Music setup: Select at least two genres you like. Select at least three artists you like. Follow any other on-screen instructions. Although your music will be removed at the end of the three-month trial if you choose not to terminate your membership, you can listen to any amount of music in the Apple Music library: Open your iPhone's Music app. Tap Search Tap the search bar at the top of the screen. Tap the Apple Music tab. Enter a name and tap Search Tap + next to a song (or tap an album and then tap +ADD) to download the song.
Question: What is a summary of what this article is about?
Understand when you can use this method. Open your iPhone's Settings. Scroll down and tap Music. Tap the grey "Show Apple Music" switch. Tap Join Apple Music. Tap Try It Free. Tap the Individual option. Tap Start Trial. Enter your Touch ID or Apple ID password. Select a payment method. Complete the Apple Music setup. Download any music you like.